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