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