A subject heading is a standard keyword (or phrase) used in a database to describe a concept. Most databases have their own subject headings, so when you search a different database, you will need to check their own list subject headings.
Using subject headings will retrieve very focused search results.
To check the Subject terms list in the Academic Search Complete database, click on "Subject terms" located at the top.
When searching the EDS, use the Filters feature located on the left side of the results page to filter your search results according to: