Identifying keywords is only the first step to effective searching. The secret to finding information efficiently is in the way you combine keywords when searching. Most databases allow you to search using Boolean Logic. Boolean logic refers to the logical relationship between search terms, and uses these three operators, or connectors:
These connectors link together two or more terms to either narrow or broaden your search.
The following Venn diagrams demonstrate how these connectors work to control your search.
In all of the above examples, only results represented by the darker purple will be retrieved.