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

Try widening your search to All Fields.

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