Use keywords to search for books and articles.
To get keywords, think about the main ideas of your topic.
For example: Which cybersecurity measures are most essential for a small business with a limited budget?
Remember, computers will search for every word that you type into the
search box, so try to keep your search simple - just a few words.
Now, let's take each of the main ideas and come up with some synonyms or related ideas:
cybersecurity -- data security, network security
small business -- business owner, entrepreneur
budget -- cost, financials
Do this with your topic, and you will have some keywords to begin your search with!