Results not on topic:

Identify the results that are somewhat on topic and take a look at the additional information for those sources. This information can generally be viewed by clicking on the title. Many databases assign subject terms to each source. Consider whether any of these subject terms, or other terms found in the abstracts/summaries, might serve as better or more relevant keywords for your topic.

Check encyclopedias or Wikipedia for synonyms, or alternative terms to use as keywords.