Here are some tips to make your searches more efficient.

AND - Use this word when you want to be sure two or more  search words are included in your search

          example  - Dolphins AND football   AND Miami      This search will find pages that include all three words.

OR - Use this word when you want to find webpages with at least one of the search words

          example  -   whales or dolphins             This search will find webpages with the word whale or the word dolphin

- (minus sign)  Use this when you want to exclude words

          example - dolphins  -football               This search will find webpages that have the word dolphin but do not   have  the word football.    (Make sure you don't put a space between the minus sign and the word!)

"quotations" - Use quotation marks when you are searching a webpage for an exact phrase

          example - "Miami Dolphins" will find pages with the exact phrase