Perhaps you should try some spelling variations:
"dopnauschwabisches schrifttum heft 19" » "donauschwabisches christentum heft 19" (Expand Search), "dopnauschwabisches schrifttum heft 1" (Expand Search), "dopnauschwabisches schrifttum heft 9" (Expand Search), "dopnauschwabisches schrifttum heft 12" (Expand Search)
"donauschwabisches schrifttum heft 10" » "donauschwabisches schrifttum heft 1" (Expand Search), "donauschwabisches schrifttum heft 12" (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 heft 19") OR ("donauschwabisches schrifttum heft 10"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"dopnauschwabisches schrifttum heft 19\") OR (\"donauschwabisches schrifttum heft 10\"))*".
• Removing quotes may allow a broader search: (( dopnauschwabisches schrifttum heft 19 ) OR ( donauschwabisches schrifttum heft 10 ))*.