It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Choosing your topic is one of the most important steps for a graduate student, and should be done in consultation with your faculty advisor. Some of the tips presented in the video below can help you get started.
The Literature Review
This tutorial from NCSU gives a good overview of the process of the literature review.