If you're looking only for articles--including scholarly, peer-reviewed journal articles--use the dropdown menu beside the main search box to select "Articles."
Enter a few important subject-related keywords in the search box and hit the "Search" button.
You can narrow your results even further on your search results screen. If you're only interested in articles from Scholarly, Peer-Reviewed journals, look for the "Limit To" panel and click the box that says "Scholarly Sources." Your results list will be updated to weed out non-scholarly sources.