Keyword Search

Search for exact words and phrases across our opinion database

Keyword Search is the right tool when the exact words matter. It searches an index built from every word in every opinion in our database, hundreds of millions of words, so it is especially useful when you want to find cases containing specific legal terms, phrases, citations, statutory references, dates, or other precise language.

What Keyword Search is best for

Keyword Search is the best choice when your research depends on the actual words used in the opinion text. It searches across a very large index of every word in every opinion in our database, so it is especially useful for precise legal research.

  • Searching for exact legal terms or phrases that may appear in an opinion.
  • Looking for statutory references, code sections, dates, or citations.
  • Narrowing results based on wording that must appear in the opinion text.
  • Testing different combinations of terms to find the most relevant authorities.

Why lawyers use it

Keyword Search gives you more control than broader concept-based searching. If you care about exact language, recurring wording, or a precise reference, this is often the right tool.

Because it searches an index built from hundreds of millions of words across the opinion database, it can surface cases where the specific language itself is part of what makes the case useful.

  • It searches a very large word-level index covering the full text of opinions in our database.
  • It is helpful when wording matters and you want to control the search more precisely.
  • It gives you multiple search modes so you can decide how strict the match should be.
  • It is often the fastest way to find cases that contain a specific phrase, reference, or wording pattern.

How to use Keyword Search

Keyword Search is straightforward to use, but small changes in phrasing can make a meaningful difference in the results.

  1. 1

    Start with the words you care about most

    Type the key terms you want to find in the opinion text. This can be a legal doctrine, a phrase, a statutory reference, or another exact wording pattern that matters to your research.

  2. 2

    Choose the search mode

    Use Default mode for a standard keyword search. Use Proximity when the terms should appear near each other. Use Sequential order when the terms should appear in the same order you typed them.

  3. 3

    Add a jurisdiction if needed

    Use the jurisdiction filter to narrow the search to a particular state or leave it broad if you are surveying more widely.

  4. 4

    Use quotes when exact wording matters

    Put quotation marks around phrases, citations, dates, or section references when you want the search to match the exact text you typed.

  5. 5

    Review the result excerpts

    The results show the original opinion excerpt where the terms appear, along with a plain-language summary of that segment, so you can quickly decide which cases are worth opening.

What the search modes mean

The mode selector changes how strict the keyword matching should be. If you are unsure where to start, begin with Default and then tighten the search if needed.

Default mode

This is the standard keyword search. It is usually the best place to start when you want to see how your terms behave before making the search stricter.

Proximity mode

Use this when the terms should appear close together in the opinion text. This is helpful when the connection between the words matters, not just whether they appear somewhere in the same case.

Sequential order mode

Use this when the terms should appear in the order you typed them. This is especially useful for recurring legal phrases and wording patterns where sequence matters.

How to make the search more precise

This tool becomes much more powerful once you start using exact phrases, exclusions, and more targeted wording.

Basic keyword search

Type words separated by spaces, such as negligence standard or statutory construction.

Exact phrase search

Put quotation marks around the phrase when you want that exact sequence, such as "fraudulent misrepresentation".

Mixing phrases and keywords

You can combine an exact phrase with additional words, such as "fraudulent misrepresentation" insurance.

Excluding words

You can exclude a term with a minus sign or by using not before the term, such as fraudulent misrepresentation -insurance.

Precise references

Use quotes for exact citations, statute sections, code references, or dates when every character matters, such as "8 U.S.C. section 1324(a)(1)" or "April 15, 2001".

What you will see in the results

The results view is designed to help you judge relevance quickly without opening every case.

Search box

Enter the keywords, phrases, or exact references you want to find in opinion text.

Search mode selector

Choose between Default, Proximity, and Sequential order depending on how strict you want the word matching to be.

Jurisdiction filter

Limit the search to a particular state when that matters for the research question.

Search Guide button

The page includes a built-in quick guide with examples you can reference while refining your search.

Original opinion excerpt

Each result shows the matching passage from the opinion so you can see the searched words in context.

Descrybe summary of the segment

Alongside the excerpt, you also see a summary of that portion of the opinion to help you evaluate relevance more quickly.

Treatment badge

Each result includes a treatment indicator that can help you quickly spot whether later cases treated the authority positively, negatively, cautiously, neutrally, or simply cited it.

When Keyword Search is especially strong

Keyword Search is often the best tool when precision matters more than broad topical matching.

  • It is especially strong when the exact wording matters.
  • It can help you find cases containing precise references that broader search tools may not surface as cleanly.
  • It gives you more control over how strictly the words should match.
  • It is a strong complement to Concept Search when you want to move from broad topic research to exact-text searching.

When to use another tool instead

Keyword Search is powerful, but it is not always the best starting point for every research task.

  • It works best when you already have a sense of the words or phrases you want to search for.
  • If you are still exploring a topic and do not know the likely wording, Concept Search may be a better place to start.
  • It is not the right tool when you want a synthesized legal answer rather than a search results list.
  • If you already know the exact case name or citation, the Case Name Search or Citation Lookup tools may be faster.

Tips for better results

A few practical habits can make Keyword Search much more effective.

  • Start broad, then tighten the search with quotes, exclusions, or a stricter mode.
  • Try multiple phrasings if you are not seeing the results you expect.
  • Use exact-phrase searching for statutes, code sections, dates, and formal wording.
  • Use Proximity mode when the relationship between terms matters more than the mere presence of both words.
  • Open the case details page before relying on a result, especially when treatment or procedural posture matters.