Perhaps you should try some spelling variations:
"dopnauschwabisches schrifttum im. 23" » "donauschwabisches christentum im. 23" (Expand Search), "dopnauschwabisches schrifttum _. 23" (Expand Search), "dopnauschwabisches schrifttum nr. 23" (Expand Search), "dopnauschwabisches schrifttum und. 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"dopnauschwabisches schrifttum im. 23\") OR (\"donauschwabisches schrifttum der. 23\"))~".
• Removing quotes may allow a broader search: (( dopnauschwabisches schrifttum im. 23 ) OR ( donauschwabisches schrifttum der. 23 ))~.
• Adding a wildcard symbol may retrieve word variants: (("dopnauschwabisches schrifttum im. 23") OR ("donauschwabisches schrifttum der. 23"))*.