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