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