+ and - Keywords:
Use + to include and - to exclude keywords.
e.g. +towel -red (must include towel where not red)
Use Quotes to search for a phrase rather than individual words.
e.g. "lord of the rings" (must match phrase lord of the rings, rather than individual words in the sentence)
Use * to search for incomplete words.
e.g. max* (find words beginning with max)
e.g. *max (find words ending with max)
e.g. *max* (find words with max anywhere in the word)