Search Tips
+	A leading plus sign indicates that the word must be present in every result.
	windows +linux ...returns results that must contain “linux”.
-	A leading minus sign indicates that the word may not be present in any result. By default (when neither plus or minus is specified) the word is optional, but the results that contain it will be rated higher.
	windows -linux ...returns results that may not contain “linux”.
< >	These two operators are used to change a word’s contribution to the relevance value that is assigned to a result. The < operator decreases the contribution, and the > operator increases it.
	install <windows >linux ...returns results that contain “install” or “windows” or “linux“, but results that contain “windows” are rated lower than results that contain “linux”.
( )	Parentheses are used to group words into subexpressions.
	install +(workpool license) ...returns results that contain “install” and “workpool” or “install” and “license”.
~	A leading tilde acts as a negation operator, causing the word’s contribution to the result relevance to be negative. It is useful for marking noise words. A result that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the - operator.
	workpool ~database ...returns results that contain “workpool” or “database”, but results that contain “database” are rated lower.
*	An asterisk is the truncation operator. Unlike the other operators, it should be appended to the word.
	work* ...returns results that contain words starting with “work”.
“ ”	The double quotes indicate that the phrase must be present, exactly as typed.
	“mysql -u root” ...returns results that contain the specified phrase.