When using the DBU catalog and databases it is best to limit your search to 1-3 powerful keywords.
To get the best results, you need to think carefully about your topic, then choose words that will get you to the heart of the matter.
The key to finding the best articles is to first find the best search terms. Some databases (especially EBSCO and GALE) make it easy to find the right words for your search. Look in the toolbar for an option called "Subject Terms," "Thesaurus," or "Subject Guide”.