if you enter a phrase, the search engine first tries for an exact match, then any of your words
if you begin a word with "+", that word must be included on each search-results page
Example: "+always" means "always" must be included on each search-results page
if you begin a word with "-", that word must not be included on any search-results page
Example: "-never" means "never" must not be included on any search-results page
if you end a word with an "*", all words which begin with that word are added to the results
Example: "gift*" might also include results for "giftware"
if you substitute a "?" in any position within a word, and another acceptable character fills that position, the resulting word will be added to the results
Example: "b?g" might also include results for "bog" or "bug"
