Perhaps you should try some spelling variations:
"east european sources." » "east european studies.", "east european series.", "east european southern.", "fast european sources."
"eastern european cities." » "western europe cities.", "eastern european countries.", "eastern european politics.", "eastern european communities.", "fastern european cities."
"eastern europe sources." » "fastern europe sources."

Try widening your search to All Fields.

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

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