Using Boolean operators when searching can help refine search results. In the examples below the highlighted portion of the circles is where you would find search results using the given Boolean operator.
Example: chocolate AND vanilla
Example: chocolate OR vanilla
Example: chocolate AND vanilla NOT pistachio
Other Search Techniques
Example: (chocolate AND vanilla) NOT (strawberry OR pistachio)
Example: Compare results for rocky road ice cream vs. “rocky road ice cream”
Example: A librar* search will include results with library, libraries, librarian, and librarians because all those words have the root librar.