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