While it seems like an arbitrary step, having a bank of keywords to reference when inputting a search is valuable in making sure you are capturing every possible resource available to you. In addition to pulling keywords from your topic and research questions, you'll want to think as well about related ideas and concepts, and synonyms for your keywords. Sometimes authors use different words or phrasing, and so having a bank of keywords to exchange and try out can help you make sure you aren't leaving anything out.

Remember: There is no such thing as a perfect search. You are not going to capture everything you need in one go. Think of research as a puzzle in this way, you have to sometimes go through each piece to find the one that fits and gives the results you desire.

As you are reading and looking through sources, keep an eye out for other words and ideas you could be searching to help drive your topic along.

Concept mapping is one brainstorming technique you can use to start forming your list of keywords and search terms.