Advanced Searching Tips
By default the search engine tries to locate pages which have exact matches for all of the words entered in your search query. If that fails, it then tries to locate pages which contain any words in your search query. If that happens a short message is displayed at the top of the search results indicating this has been done.
In addition, there are several ways to modify the default search behavior.+ and - qualifiers
All of these techniques can be combined: +alway* -ne??r*