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 19 » heft 1 (Expand Search), heft 9 (Expand Search), heft 10 (Expand Search)
heft 12 » heft 1 (Expand Search), heft 2 (Expand Search), heft 10 (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( dopnauschwabisches schrifttum heft 19 ) OR ( donauschwabische schrifttum heft 12 ))~".
• Adding a wildcard symbol may retrieve word variants: (( dopnauschwabisches schrifttum heft 19 ) OR ( donauschwabische schrifttum heft 12 ))*.