Perhaps you should try some spelling variations:
"dopnauschwabisches schrifttum im. 23" » "donauschwabisches schrifttum im. 23" (Expand Search), "donauschwabisches christentum im. 23" (Expand Search), "dopnauschwabisches schrifttum nr. 23" (Expand Search), "dopnauschwabisches schrifttum der. 23" (Expand Search), "dopnauschwabisches schrifttum und. 23" (Expand Search)
"donauschwabische schrifttum _. 23" » "donauschwabisches schrifttum _. 23" (Expand Search), "donauschwabisches christentum _. 23" (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 _. 23") OR ("dopnauschwabisches schrifttum im. 23"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabische schrifttum _. 23\") OR (\"dopnauschwabisches schrifttum im. 23\"))".
• Removing quotes may allow a broader search: (( donauschwabische schrifttum _. 23 ) OR ( dopnauschwabisches schrifttum im. 23 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabische schrifttum _. 23") OR ("dopnauschwabisches schrifttum im. 23"))*.