Perhaps you should try some spelling variations:
zur sudostdeutschen » der sudostdeutschen (Expand Search), fur sudostdeutsche (Expand Search), des sudostdeutschen (Expand Search)
schriftenreihe zur » schriftenreihe der (Expand Search), schriftenreihe des (Expand Search)
zur problem » zum problem (Expand Search), fur probleme (Expand Search)
problem zur » problem der (Expand Search)
lander » landes (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: (sudost OR sudosten)-stimmen: schriftenreihe zur problem zur sudostdeutschen lander~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(sudost OR sudosten)-stimmen: schriftenreihe zur problem zur sudostdeutschen lander".
• Adding a wildcard symbol may retrieve word variants: (sudost OR sudosten)-stimmen: schriftenreihe zur problem zur sudostdeutschen lander*.