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