Perhaps you should try some spelling variations:
"donauschwabisches christentum der. 23" » "donauschwabisches schrifttum der. 23" (Expand Search), "dopnauschwabisches schrifttum der. 23" (Expand Search), "donauschwabisches christentum eine. 23" (Expand Search)
"donauschwabische schrifttum uber. 23" » "donauschwabisches schrifttum uber. 23" (Expand Search), "dopnauschwabisches schrifttum uber. 23" (Expand Search), "donauschwabische schrifttums der. 23" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("donauschwabische schrifttum uber. 23") OR ("donauschwabisches christentum der. 23"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabische schrifttum uber. 23\") OR (\"donauschwabisches christentum der. 23\"))".
• Removing quotes may allow a broader search: (( donauschwabische schrifttum uber. 23 ) OR ( donauschwabisches christentum der. 23 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabische schrifttum uber. 23") OR ("donauschwabisches christentum der. 23"))*.