The keyword search looks for a keyword or phrase exactly
as typed. It will search all fields in the database for
the term you enter. Do not use multiple keywords unless they
are likely to appear together in the way you specify.
Avoid using plurals, as the singular form of a word will find singular and plural occurrences, e.g. searching for "wine" will find all instances of both "wine" and "wines", whereas a search for "wines" will omit all instances of "wine" (singular).
