Finding literature on a specific topic is one of the most important skills to learn, and it's more an art than a science. It requires persistence and creativity. You need to know about the appropriate tools and databases, and know how to use them effectively. This is much more than just "googling" some words!
Whether you have an assigned topic, and you need to narrow down to a manageable research question or start forming a hypothesis, or you are free to choose any topic you want, the first step in narrowing that topic is researching sources for background information.
A good place to start is reference sources and handbooks. Browse through the articles and see if any of the topics look interesting. Notice what keywords are used to describe your area of interest, and use those words to search for more sources. Look at the end of each article to see which sources were used; those are probably key sources that you will want to track down. Here are some places to start:
You can browse through scholarly journals when looking for a topic. This will help you refine your topic and find sources that you can use in your project. Here are some links to relevant journals:
As you browse through these sources, be sure to note: