Perhaps you should try some spelling variations:
"eastern european southern." » "eastern europe southern.", "eastern europe northern.", "western europe southern.", "fastern european southern."
"east european sources." » "east european studies.", "east european series.", "east european journal.", "fast european sources."
"eastern europe sources." » "fastern europe sources."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("eastern european southern.") or ("east european sources."))) or ("eastern europe sources."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("eastern european southern.") OR ("east european sources."))) OR ("eastern europe sources."))*.
• Removing quotes may allow a broader search: (((( eastern european southern. ) or ( east european sources. ))) or ( eastern europe sources. ))*.