Boolean Operators:
Use the following operators to require or exclude keywords in your search:

Keyword Action
AND Finds only records containing all of the specified words or phrases. septic AND shock finds records with both the word septic and the word shock.
OR Finds records containing at least one of the specified words or phrases. septic OR shock finds records containing either septic or shock. The found records could contain both, but do not have to.
NOT Excludes records containing the specified word or phrase. septic NOT shock finds records with septic, but not containing shock.