ASSISTANT

Search Tips

Boolean logic defines the logical relationships between terms in a search. Boolean search supports the operators AND, OR, NOT. You can use these operators to create very broad or very narrow searches.

AND	OR	NOT
Each result contains all search terms.	Each result contains at least one search term.	Results do not contain the specified terms.
The Heart AND lung search finds items containing both heart and lung. see.	The Heart OR lung search finds items containing either heart or lung. see.	The Heart NOT lung search finds items containing heart but not lung. see.

Boolean Operators and Parentheses Usage

Usage of *(asterisk) Search

Usage of Quotation Search

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