To Find:

Type(for example):

A Phrase - word order as entered (narrowest search)

home repair

All the words entered (narrow search)

home and repair

Either word entered (broad search)

home or house

First word, but not the second

home and not repair

Single interior letter or ending 

wom?n

Multiple endings or interior letters (up to 5 letters)

under* and arch*logy

Multiple endings (any number of letters)

compu**

Words near each other (within 10 words)

united near history

Words near each other (within any number)

united within 2 congress