use keywords with narrow meanings (ex: transmission could refer to cellular phones or
automobiles)
put the most important words in the front of the search
put a "+" in front of any word that you want to include, and a "-"
in front of any word that you want to exclude
use commas between words to signify a word instead of a phrase, when using phrases, put
quotation marks around it
You may use a ';' (semi-colon) between expressions to represent a logical
"AND" while a ',' (comma) represents
an "OR". So, to search for APPLE and ORANGE, use "APPLE;ORANGE". You
may also use full regular
expressions in the search field.