Keywords and Subject Headings
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"
You can also search using subject headings. Databases assign subject headings to articles 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.
Interested in text tutorials? Click the PDF links below:
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