Perhaps you should try some spelling variations:
geschichte sudosteuropa » geschichte sudosteuropas (Expand Search)
deutschen kultur » deutsche kultur (Expand Search), ostdeutsche kultur (Expand Search)
und geschichte » zur geschichte (Expand Search), die geschichte (Expand Search), der geschichte (Expand Search)
instituts der » institut der (Expand Search), instituts zur (Expand Search), instituts heft (Expand Search)

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: ((instituts fur) OR (instituts der)) deutschen kultur und geschichte sudosteuropa~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((instituts fur) OR (instituts der)) deutschen kultur und geschichte sudosteuropa".
• Adding a wildcard symbol may retrieve word variants: ((instituts fur) OR (instituts der)) deutschen kultur und geschichte sudosteuropa*.