Perhaps you should try some spelling variations:
"expulsion of germans after world war ii" » "expulsion of germans alter world war ii" (Expand Search), "expulsion of germans amter world war ii" (Expand Search)
"Expulsion of Germans samter World War II" » "Expulsion of Germans amter World War II" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("expulsion of germans after world war ii") OR ("Expulsion of Germans samter World War II"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"expulsion of germans after world war ii\") OR (\"Expulsion of Germans samter World War II\"))*".
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