Searching a library database is not like searching Google; many databases are very unforgiving of typos and have many more features. They tend to, however, have the same searching mechanisms, look, and feel.
1. Search in a library database (suggestions below) using the 2-3 nouns you have identified. Combine keywords and phrases to search for the specific aspects of your question
2. Read the title and abstracts of the articles that sound relevant then skim the article
3. Get the entire article
4. Make an Interlibrary Loan Request if the article is not available by clicking on "Make A Request
Use a combination of keywords and phrases to search for the specific aspects of your question.
REMEMBER: A primary source of literature will generally have a "methods" section.