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