When the results come up from your first search in Academic Search Complete, if you've gotten more than 30 - 50 articles, then you need to refine the search. One way to do this is to apply the limiters the database provides in the left panel of the Results screen.
1. Limit to Full Text and narrow the Publication Date according to your assignment's instructions. Use the sliders or type in years to change the date range. Then Update the Results list.
2. If you still have too many articles, click on the arrow next to Subject: Thesaurus Term to see a list. The terms in this list are assigned to articles when they are added to the database. The subject terms tell you generally what the article is about. In this example, Escherichia coli looks like the best term to choose because 30 articles have the term and that's a good number of articles to browse.
Don't forget to Update and go on to Find an Article.