Hi, Craig - Stenka Razin (click here) is in the database. You will note at the bottom of the lyrics there there are a few words listed with the @ sign in front of them. Those are the Digital Tradition categories assigned to that song. If you put @Russia in the search box at the upper-right corner of this page, you may find other Russian folk songs. Check back at this thread. Maybe somebody will post some of the others you requested.
-Joe Offer-