Here’s a close-to-exhaustive list of Google search operators you can use to refine your searches and find exactly what you’re looking for:

Basic Operators:

• Quotation Marks (” “): Find webpages containing the exact phrase you enter within quotes.
• OR: Search for results related to one term or another. (e.g., cats OR dogs)
• AND: Search for results related to both terms. (e.g., cats AND dogs)
• – (Minus Sign): Exclude terms from your search. (e.g., cars -used)
• Asterisk (*): Wildcard symbol that matches any word or phrase. (e.g., flower *)

Search by Location:

• site:domain Search a specific website. (e.g., site:nytimes.com)

Search by Content:

• allintitle: Find webpages where all the keywords are in the title. (e.g., allintitle:search operators)
• intitle: Find webpages where a keyword is in the title. (e.g., intitle:Google search)
• allintext: Find webpages where all the keywords are in the text. (e.g., allintext:artificial intelligence)
• intext: Find webpages where a keyword is in the text. (e.g., intext:machine learning)
• filetype: Search for specific file types. (e.g., filetype:pdf)

Search by Other Criteria:

• related: Find websites related to a specific domain. (e.g., related:wikipedia.org)
• define: Get the definition of a word or phrase directly in search results. (e.g., define:photosynthesis)
• author: Find content written by a specific author. (e.g., author:Stephen Hawking)
• cache: See the cached version of a webpage. (e.g., cache:www.example.com)
• weather: Get the weather for a specific location. (e.g., weather:London)
• stocks: Get stock information for a specific ticker symbol. (e.g., stocks:GOOG)
• map: Show a map for a location or search term. (e.g., map:Eiffel Tower)
• movie: Find information about a movie. (e.g., movie:The Godfather)
• $ (currency symbol): Search for prices in a specific currency. (e.g., camera $500)
• source: Search news articles from a specific news source. (e.g., source:BBC)
• before: Search for results published before a specific date (YYYY-MM-DD). (e.g., climate change before:2010-01-01)
• after: Search for results published after a specific date (YYYY-MM-DD). (e.g., self-driving cars after:2023-01-01)
• _ (underscore): Acts as a wildcard in Google Autocomplete. (e.g., _president)

Keep in mind:

• Not all operators work exactly the same way, and Google may update or add functionality from time to time.
• You can often combine multiple operators in a single search for even more refined results.

By using these operators effectively, you can become a Google search ninja and find the information you need quickly and efficiently.

Also, from another source:

Google search operators are special characters and commands that help refine and narrow down search results. Here’s an exhaustive list of Google search operators:

1. Site: Limits the search to a specific site or domain. Example: site:wikipedia.org
2. Intitle: Searches for words or phrases within the title of web pages. Example: intitle:apple
3. Inurl: Searches for words or phrases within the URL of web pages. Example: inurl:technology
4. Intext: Searches for words or phrases within the body text of web pages. Example: intext:artificial intelligence
5. Filetype: Limits results to specific file types. Example: filetype:pdf
6. Related: Finds sites similar to the specified site. Example: related:nytimes.com
7. Define: Provides definitions for words or phrases. Example: define:algorithm
8. OR: Searches for either one term or another. Example: apple OR orange
9. AND: Requires both terms to appear in the search results. Example: apple AND orange
10. Minus (-): Excludes specific words from search results. Example: apple -fruit
11. Asterisk (*): Acts as a wildcard within a search term. Example: art *
12. Around (AROUND n): Finds words within a certain proximity of each other. Example: apple AROUND(5) orange
13. Numrange: Searches within a range of numbers. Example: Star Wars 2000..2020
14. Allintitle: Searches for multiple terms within the title of web pages. Example: allintitle:apple iphone
15. Allinurl: Searches for multiple terms within the URL of web pages. Example: allinurl:technology news
16. Allintext: Searches for multiple terms within the body text of web pages. Example: allintext:artificial intelligence
17. Cache: Displays the cached version of a web page. Example: cache:example.com
18. Link: Finds pages linking to a specific URL. Example: link:example.com
19. Site Search (Search within a specific site): Allows users to perform a search within a specific website. Example: site:wikipedia.org artificial intelligence
20. Hashtags (#): Searches for hashtags on social media platforms. Example: #technology
21. Currency Conversion: Converts currencies. Example: 100 USD to GBP
22. Weather: Provides weather forecasts. Example: weather New York
23. Stocks: Provides stock market information. Example: stocks:GOOGL
24. Time: Displays the current time in a specified location. Example: time London
25. Calculator: Performs calculations. Example: 100 + 50
26. Unit Conversion: Converts units of measurement. Example: 10 miles in kilometers
27. Sunrise/Sunset: Provides sunrise and sunset times for a specified location. Example: sunrise New York
28. Movie: Displays movie information. Example: movie:Inception
29. Map: Displays maps and directions. Example: map New York City
30. Flight Status: Provides flight status information. Example: flight status AA 123

These operators can be combined and used in various ways to refine and customize Google searches according to specific needs and preferences.