Library search engines (databases) are a great place to find scholarly journal articles or other sources for your paper. Each search engine has a different flavor/subject area it covers. If the full text isn’t right there, click the Find It button. If we don’t have the article, you can request it from another library by clicking the “get this article or book chapter” link. (The turnaround time on this is usually about 2 days.)
Keywords are simply those words you type into the search box to get the results you want. Just like in Google, you don't type your whole question, just the important words or terms that will help you get the answers. Remember to consider synonyms when you create your keyword list.
So what are subjects then? Subjects are a specific word or phrase some librarian has assigned to a particular topic. Basically it's a tag we attach to articles or books. Why would we do that? Because that way when you search for that specific word or phrase you get EVERYTHING that has been tagged with that term. You can find these subjects (or subject headings) in the library catalog and most databases (except JSTOR). Usually they live along the left side bar or in the middle of the record (when you click on a specific book or article).