Perhaps you should try some spelling variations:
"dopnauschwabisches schrifttum heft. 23" » "donauschwabisches schrifttum heft. 23" (Expand Search), "donauschwabisches christentum heft. 23" (Expand Search)
"donauschwaben geschichte uber. 23" » "donauschwabischen geschichte uber. 23" (Expand Search), "donauschwabische geschichte uber. 23" (Expand Search), "donauschwaben deutsche uber. 23" (Expand Search), "donauschwaben geschichte der. 23" (Expand Search), "donauschwaben geschichte einer. 23" (Expand Search), "donauschwaben geschichte ihrer. 23" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwaben geschichte uber. 23\") OR (\"dopnauschwabisches schrifttum heft. 23\"))~".
• Removing quotes may allow a broader search: (( donauschwaben geschichte uber. 23 ) OR ( dopnauschwabisches schrifttum heft. 23 ))~.
• Adding a wildcard symbol may retrieve word variants: (("donauschwaben geschichte uber. 23") OR ("dopnauschwabisches schrifttum heft. 23"))*.