AND is the default operator. Entering multiple words without an operator will match pages that contain ALL of those words.

The OR operator allows matching pages that contain either word.

You can use the NOT operator to exclude certain words from the search results.

Exact strings can be matched by placing them inside double quotes (").

You can change the order of evaluation of the search string by using () brackets. Expressions inside brackets will be evaluated first.

All search words and operators are not case sensitive. Matches will be found in the page title, keywords, description and body text.

Search String	Results will contain pages that:
lion tiger	contain the word lion and the word tiger (equivalent to "lion AND tiger")
lion AND tiger	contain both the word lion and the word tiger
lion OR tiger	contain either the word lion or the word tiger
NOT lion	do not contain the word lion
lion AND NOT tiger	contain the word lion and do not contain the word tiger
"red lion"	contain the exact string red lion (the word red must be followed immediately by the word lion)
"red lion" AND NOT "blue tiger"	contain the exact string red lion and do not contain the exact string blue tiger
(red AND lion) OR (blue AND tiger)	contain the exact words red and lion or the words blue tiger