Three good starting points for research:
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Check out this tutorial...
Symbol | Explanation | Example |
AND | Logical operator combines all search terms | teenagers AND diet |
OR | Logical operator finds either search term | diet OR nutrition |
NOT | Logical operator excludes specified search term | diet NOT nutrition |
() | Nesting indicates order of search; items in () are found first | teenagers AND (diet OR nutrition) |
* | Truncation finds root word and various endings | teen* |
?, # | Wildcard searches for a character(s) within a word | wom?n theat### |
"" | Phrase searching searches for words as a phrase in the order entered | "drug abuse" |