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