Perhaps you should try some spelling variations:
sudosteuropaischen raumes » sudostdeuropaischen raumes (Expand Search), osteuropaischen raum (Expand Search), sudosteuropaischen volker (Expand Search)
der sudosteuropaischen » des sudostdeuropaischen (Expand Search), zur osteuropaischen (Expand Search)
der problem » dem problem (Expand Search), fur probleme (Expand Search)
problem der » problem des (Expand Search), probleme des (Expand Search), problem zur (Expand Search)

Try widening your search to All Fields.

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

• Removing quotes may allow a broader search: (sudost OR sudosten)-stimmen: schriftenreihe der problem der sudosteuropaischen raumes.