How to find out the terms used for a topic, so that I can find the appropriate literature on it?
As Aleksandar says, you do need to learn the terminology in order to search effectively for articles. And in fact, you'll need to know the terminology in order to understand those articles. When I'm exploring a new subject area, I don't start with the journal articles; I start with books, web tutorials, etc., to get the basics.

For learning the terminology, I also suggest reading the relevant articles in Wikipedia or Scholarpedia. They will also have links to journal articles; get hold of those articles and see what keywords they use. Anytime you find a useful article, note the keywords, and what journal it's in. This will help you find other useful articles, and places where you might submit your own articles in future.

Also, your college librarian may be able to help you figure out some of the keywords to use. They usually know a little about a wide variety of topics, at least enough to have some ideas of what search terms might be useful. If you set up an appointment, they may be able to spend some time with you, helping you find some sample articles and working with you to figure out a good search strategy.