Perhaps you should try some spelling variations:
instituts heft » instituts der (Expand Search)
die geschichte » zur geschichte (Expand Search)
institut der » instituts der (Expand Search), instituts fur (Expand Search), instituts zur (Expand Search)
kultur die » kultur der (Expand Search), kultur im (Expand Search), kultur mit (Expand Search)
sudosteuropas* » sudosteuropa* (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: ((instituts heft) OR (institut der)) ostdeutsche kultur die geschichte sudosteuropas~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((instituts heft) OR (institut der)) ostdeutsche kultur die geschichte sudosteuropas*".