Perhaps you should try some spelling variations:
donauschwabisches christentum » donauschwabisches schrifttum (Expand Search), dopnauschwabisches schrifttum (Expand Search)
donauschwabische schrifttum » donauschwabisches schrifttum (Expand Search), dopnauschwabisches schrifttum (Expand Search)
christentum heft » christentum der (Expand Search), christentum eine (Expand Search)
heft 12 » heft 1 (Expand Search), heft 2 (Expand Search), heft 10 (Expand Search)
heft 9 » heft 3 (Expand Search), heft 1 (Expand Search), heft 2 (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 heft 9 ) OR ( donauschwabisches christentum heft 12 ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( donauschwabische schrifttum heft 9 ) OR ( donauschwabisches christentum heft 12 ))".
• Adding a wildcard symbol may retrieve word variants: (( donauschwabische schrifttum heft 9 ) OR ( donauschwabisches christentum heft 12 ))*.