Articles that include methods, results, literature review are a specific type of academic or scholarly research that tends to be more common in the sciences and social sciences. Here is a break down of the terms:
When articles are published on this type of research, they frequently include a literature review near the beginning of the article. A literature review discusses the findings of research on the same or related subject. In other words, what is known so far on this subject.
How the author or authors are going to find out what they want to know about the subject are their methods, or methodology.
What they found out based on their research.