If you are not yet familiar with the terminology of your topic, you can use some tools to come up with search terms:
- General dictionaries, for example https://www.merriam-webster.com/
- Specialist dictionaries such as Pinkhof medical dictionary
A thesaurus is a keyword list that contains references to related keywords. You can find synonyms and see which words are related.
A term like visual arts refers to the umbrella term art, but also to the more specific terms painting and photography.
You choose an article or book that fits your question well and use the information you find in it to extend your search.