Boolean operators allow you to expand or narrow your search as needed.
Note that Boolean operators are case sensitive; they must be typed in all caps.
Combine search concepts to narrow (“AND”) or broaden (“OR”) results. Use “NOT” to exclude records from retrieval.
If you enter the following
The search engine will…
You can change the search by grouping concepts within parentheses.
Note the subtle difference in scope between the search above and this search, where the search engine will…
If you wish to group concepts, but are searching multiple fields, enter concepts on individual rows and select the field from the drop-down menu. For example: