Perhaps you should try some spelling variations:
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"dopnauschwabisches schrifttum eine. 23" » "donauschwabisches schrifttum eine. 23" (Expand Search), "dopnauschwabisches schrifttum kleine. 23" (Expand Search), "dopnauschwabisches schrifttum und. 23" (Expand Search), "dopnauschwabisches schrifttum im. 23" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("donauschwabisches christentum eine. 23") OR ("dopnauschwabisches schrifttum eine. 23"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"donauschwabisches christentum eine. 23\") OR (\"dopnauschwabisches schrifttum eine. 23\"))".
• Removing quotes may allow a broader search: (( donauschwabisches christentum eine. 23 ) OR ( dopnauschwabisches schrifttum eine. 23 )).
• Adding a wildcard symbol may retrieve word variants: (("donauschwabisches christentum eine. 23") OR ("dopnauschwabisches schrifttum eine. 23"))*.