The following are databases that make a large number of periodicals searchable. In some cases you will be searching the full-text of articles by default, in other cases only the title, abstract, and subjects. Look for an "Advanced Search" link to see more options.
Words to try:
Instead of searching a database, you could go straight to one of these journals and browse the contents. This can be a good way to see what scholars are currently writing about. Or, click "Search within this publication" and add keywords related to your topic.