*	NOT is evaluated before AND.
*	NOT can only occur after AND (as in AND NOT; the combination OR NOT is not allowed. A query of NOT A is also not allowed.).
*	AND is evaluated before OR.
*	AND expressions are associative and can be applied in any order. For example, A AND B AND C, is the same as (A AND B) AND C, which is the same as A AND (B AND C).
*	OR expressions are associative and can be applied in any order.
*	Exact phrases can also be used in boolean search by using double-quotes. A search for "nuclear weapons" AND poison can be performed.

Ignored Words:	Queries that include a common word from the ignored words list may result in an error.
Wildcards (*):	Search for words with the same prefix of at least 3 letters with the asterisk. An example is type com* to find company, computer, commission, etc.
Exact Phrase:	Search for the exact query.
All Words:	Search for all the words in the query.
Any Words:	Search for any of the words in the query.
Boolean Search:	Search using AND, OR, and NOT. view advanced boolean search tips