To search within your results, use the Search in Results box available at the bottom of the right-side navigators menu. Enter an additional keyword or phrase, and click "Go." Your results will be narrowed to include only those articles which meet both your original, and your additional criteria.

You may Search in Results multiple times in succession to narrow your results even further.

Please note: You cannot use Search in Results to alter your source selections from your initial search. If you need to assign a different set of sources to your search, you will have to use Modify or begin a New Search.