When doing design research, you are often doing research to define a problem. By deeply understanding the problem, need, or context you can innovate, and back up your innovative decisions to others. Your design solution is only going to be as good as your problem research.
Your design solution may address problems such as:
Below are database recommendations for researching problems and solutions in various fields
AND link words by AND to search for all words in the same resource
OR link words by OR to search for one word or another (instead of both/all words)
NOT to eliminate results with a certain term
“Quotations” – add quotations to a group of two or more words to search for the exact phrase