Keywords and Subject Headings
Keywords
When you search with keywords, you are trying to find words that authors have used in their titles and abstracts or somehow otherwise appear in the article's entry in a database. Therefore you need to brainstorm all of the possible ways authors could refer to your concept:
"endurance" OR "physical fitness"
"education" OR "training" OR "school" OR "learning"
Subject Headings
You can also search using subject headings. Subject headings are keywords assigned by the databases to describe the concepts in an article and to try to take some of the guesswork out of the job of coming up with keywords. Try searching with subject headings and see how your results differ from searching with just keywords.
Still unsure about subject headings? Watch this video for another explanation as well as tips on how to find them.
Modifying an Unsuccessful Search
If you aren't happy with the list of articles your search brings back, here are some ways you might think about changing your search.
1. Too many articles / Articles aren't on topic
2. Too few articles
Photo by Anant Nath Sharma, used with permission under a Creative Commons license
Discipline Based Databases
Most databases in Academic Libraries are "discipline based," meaning they specialize in the literature from a specific discipline. The features in these databases can be especially helpful when you need to create complex searches for a more comprehensive literature searches.