There are relatively few specialized journals that focus on folklore & folklife & the best single database for searching those is JSTOR. However, JSTOR won't have the most recent articles available--for those, using the library's "Start My Research" search box covers all of the critical titles. Just make sure to use a "facet limit" in the Subject Terms list--choose "Folklore" to help restrict your articles to that topic area.
Indexes critical literary and language scholarship and provides access to journals and serials, books, essay collections, working papers, proceedings, dissertations, and bibliographies.