Keywords may be separated by AND and/or OR statements for greater control of the search results.
For example, red AND blue would generate a result set that contain both words. However, for green OR yellow, the result set returned would contain both or either words.
Exact matches can be searched for by enclosing keywords in double-quotes.
For example, "Learning Bird" would generate a result set which match the exact string.
Brackets can be used for further control on the result set.
For example, Christmas and (angel or spirit or "prayer").