In order to develop keywords, look at the nouns within you research questions - persons, places, and things. You can also think about the 5Ws:
- Who? Consider the different people or populations involved.
- What? Are there subgroups to this topic that are interesting to me?
- When? Consider the timeframe or parameters, when did your topic take place?
- Where? Places that are involved or impacted by your research topic.
- Why? Why is this topic important or meaningful to your or to others?
List keywords that relate each concept in your research. Boil your topic down to the most important words. Ignore superfluous words like in, the, of, with, against, affect, impact. Begin with a keyword search!