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