Perhaps you should try some spelling variations:
"donauschwabisches christentum heft 10" » "dopnauschwabisches schrifttum heft 10" (Expand Search), "donauschwabisches christentum der 10" (Expand Search), "donauschwabisches christentum eine 10" (Expand Search), "donauschwabisches christentum heft 1" (Expand Search), "donauschwabisches christentum heft 12" (Expand Search), "donauschwabisches christentum heft 19" (Expand Search)
"donauschwabisches schrifttum heft 9" » "donauschwabisches schrifttum heft 3" (Expand Search), "donauschwabisches schrifttum heft 1" (Expand Search), "donauschwabisches schrifttum heft 2" (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: (("donauschwabisches schrifttum heft 9") OR ("donauschwabisches christentum heft 10"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabisches schrifttum heft 9\") OR (\"donauschwabisches christentum heft 10\"))".
• Removing quotes may allow a broader search: (( donauschwabisches schrifttum heft 9 ) OR ( donauschwabisches christentum heft 10 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabisches schrifttum heft 9") OR ("donauschwabisches christentum heft 10"))*.