The Boolean operators (AND, OR, NOT) can be used in Keyword Expert searches, but not any of the basic Keyword searches.
If two or more words are entered without any Boolean operators, they will be searched as if connected with AND.
Operators may be in lower or upper case.
If AND, OR, or NOT are in a search phrase, put the phrase in quotes.
"nickel and dime"
"dazed and confused"
Enclose search terms and operators in parentheses to specify the order in which they are to be interpreted. Information within parentheses is interpreted first, then information outside parentheses is interpreted next.
(life OR death) AND philosoph*
If there are nested parentheses, the inner most parenthetical expressions are interpreted first, then the next, until the full search statement has been interpreted.
((song* OR poem*) AND (life OR death)) AND antholog*
A dash before a word acts as NOT.
cats -dogs