Perhaps you should try some spelling variations:
"polnischer biographical dictionar" » "polnische biographical dictionar" (Expand Search), "polnischen biographical dictionar" (Expand Search), "polnischer biographische dictionar" (Expand Search), "polnischer biographie dictionar" (Expand Search), "polnischer biographi dictionar" (Expand Search)
"polnisch biographical dictionar" » "polnisch biographische dictionar" (Expand Search), "polnisch biographie dictionar" (Expand Search), "polnisch biographi dictionar" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("polnischer biographical dictionar") OR ("polnisch biographical dictionar"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"polnischer biographical dictionar\") OR (\"polnisch biographical dictionar\"))*".
• Removing quotes may allow a broader search: (( polnischer biographical dictionar ) OR ( polnisch biographical dictionar ))*.