Perhaps you should try some spelling variations:
dopnauschwabisches schrifttum » donauschwabisches schrifttum (Expand Search), donauschwabisches christentum (Expand Search)
donauschwabische schrifttum » donauschwabisches schrifttum (Expand Search), donauschwabisches christentum (Expand Search)
heft 10 » heft 1 (Expand Search), heft 12 (Expand Search), heft 19 (Expand Search)
heft 2 » heft 3 (Expand Search), heft 1 (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: ((donauschwabische schrifttum) OR (dopnauschwabisches schrifttum)) ((heft 10) OR (heft 2))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((donauschwabische schrifttum) OR (dopnauschwabisches schrifttum)) ((heft 10) OR (heft 2))".
• Adding a wildcard symbol may retrieve word variants: ((donauschwabische schrifttum) OR (dopnauschwabisches schrifttum)) ((heft 10) OR (heft 2))*.