A successful search often begins with effective search terms. Where do you find terms?
Wikipedia is a great resource to start your list of keywords. Often in the first sentence of an entry, you will find synonyms; keep track of these terms as different keywords will work better within different resources. In addition, you can find related terms and key figures.
You can also find search terms in your anthology textbooks, background sources, or reference sources. As you do your research, keep a running list of search terms as different databases may prefer different keywords.