Perhaps you should try some spelling variations:
"donauschwabisches christentum eine 10" » "donauschwabisches schrifttum eine 10" (Expand Search), "dopnauschwabisches schrifttum eine 10" (Expand Search), "donauschwabisches christbaum eine 10" (Expand Search), "donauschwabisches christentum der 10" (Expand Search), "donauschwabisches christentum reihe 10" (Expand Search)
"donauschwabische schrifttum heft 10" » "donauschwabisches schrifttum heft 10" (Expand Search), "dopnauschwabisches schrifttum heft 10" (Expand Search), "donauschwabische schrifttum heft 1" (Expand Search), "donauschwabische schrifttum heft 12" (Expand Search), "donauschwabische schrifttum heft 19" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("donauschwabische schrifttum heft 10") OR ("donauschwabisches christentum eine 10"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabische schrifttum heft 10\") OR (\"donauschwabisches christentum eine 10\"))".
• Removing quotes may allow a broader search: (( donauschwabische schrifttum heft 10 ) OR ( donauschwabisches christentum eine 10 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabische schrifttum heft 10") OR ("donauschwabisches christentum eine 10"))*.