Boolean operators are the words AND and OR. Databases treat them like mathematical operators (plus, minus, etc.), so you can use them to make your search better and faster.
AND = show me articles that contain both of these keywords. Use this to combine different concepts in your search.
Example: artificial intelligence AND medical imaging
OR = show me articles that contain one of these keywords.Use this for synonyms. If you're not seeing relevant results right away, it might be that authors are using a different term for your topic, or spelling the same term a different way.
Example: United States OR USA OR US OR America
You can also string Booleans together like algebra--anything within the parenthesis happens together and happens first.
Example: (AI OR artificial intelligence) AND (health OR medicine)
This example will search for articles that have at least one of the AI terms and at least one of the health terms.