Check the"SEARCH HELP/TIPS or ADVANCE SEARCH"section of the search engine
being used for these Boolean expressions:
AND
Assures all terms requested will appear on the selections
OR
Selections will return either of two terms
NOT
Selections will not contain the words you specify
NEAR
Selections will find words within a ten-character distance
of each other or according to the number of characters you specify;
depends on the search engine used
Parentheses ( )
NOT Bill AND Clinton will yield pages with Clinton in them;
NOT (Bill AND Clinton) avoids selections with both names
Plus (+) and Minus (-)
Place a plus or minus sign in front of keywords to either
include or exclude them
