By default the keywords field will accept a list of words separated by spaces as in the example shown below:
congress economy policy
This query will show all stories that contain the words congress, economy and policy. The spaces are assumed to be Boolean ands (see section on Boolean Operators), meaning that all terms are required to be in all stories retrieved. This is only a small part of the potential power the NewsLibrary search engine offers. Features such as Wildcard Characters and Proximity Operators are also available.