Keywords may be separated by AND and/or OR statements for greater control of the search results.
For example, Aniseed AND oil would generate a result set that contain both words. However, for oil OR lotion, the result set returned would contain both or either words.
Exact matches can be searched for by enclosing keywords in double-quotes.
For example, "lemon oil" would generate a result set which match the exact string.
Brackets can be used for further control on the result set.
For example, Aniseed and (oil or rub or "essential oil").