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