Step 1: Write down your research question or statement (this may be your thesis)
Step 2: Identify the 2-3 nouns that are the most important from that research question or statement
Step 3: 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
Step 4: Read the title and abstracts of the articles that sound relevant
Step 5: Get the entire article
Step 6: 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.