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

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