Perhaps you should try some spelling variations:
"donauschwabisches christentum heft 1" » "donauschwabisches schrifttum heft 1" (Expand Search), "dopnauschwabisches schrifttum heft 1" (Expand Search), "donauschwabisches christentum der 1" (Expand Search), "donauschwabisches christentum eine 1" (Expand Search), "donauschwabisches christentum heft 3" (Expand Search)
"donauschwabische schrifttum heft 1" » "donauschwabisches schrifttum heft 1" (Expand Search), "dopnauschwabisches schrifttum heft 1" (Expand Search), "donauschwabische schrifttum heft 3" (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: "((\"donauschwabische schrifttum heft 1\") OR (\"donauschwabisches christentum heft 1\"))~".
• Removing quotes may allow a broader search: (( donauschwabische schrifttum heft 1 ) OR ( donauschwabisches christentum heft 1 ))~.
• Adding a wildcard symbol may retrieve word variants: (("donauschwabische schrifttum heft 1") OR ("donauschwabisches christentum heft 1"))*.