Perhaps you should try some spelling variations:
sudostendeuropaischen raumes » sudostdeuropaischen raumes (Expand Search)
zur sudostendeuropaischen » der sudosteuropaischen (Expand Search), des sudostdeuropaischen (Expand Search), zur osteuropaischen (Expand Search)
schriftenreihe des » schriftenreihe der (Expand Search)
des problem » dem problem (Expand Search)
problem zur » problem der (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: sudosten-stimmen: schriftenreihe des problem zur sudostendeuropaischen raumes~.
• Adding a wildcard symbol may retrieve word variants: sudosten-stimmen: schriftenreihe des problem zur sudostendeuropaischen raumes*.