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