* Used to expand the word you are searching to include plurals. etc.

              Example: Pakis* gives you Pakistan, Pakistani 

"quotes"  Use for phrases     Example "Noble Peace Prize"

OR Use for either or searching       Example: Child or teen

And Use to combine terms you want to have  Example: Educat* and Pakis*

Not  Use when you want to eliminate a word from your search (Warning: if you cut a word and it is in an article with words you want, you won't see that article!)