Use AND to narrow a search and retrieve records containing all of the words it separates, e.g. adolescents AND children will only find records containing both these words.

Content for first Accordion.

Use OR to broaden a search and retrieve records containing any of the words it separates, e.g.adolescents OR children will find records containing adolescents only, children only, or both words.

Use NOT to narrow a search and retrieve records that do not contain the term following it, e.g. adolescents NOT children will find records that contain adolescents, but will not contain the word children.