Perhaps you should try some spelling variations:
"polnischer academia of sciences" » "polnische academia of sciences" (Expand Search), "polnischen academia of sciences" (Expand Search), "polnisch academia of sciences" (Expand Search), "polnischer akademie of sciences" (Expand Search)
"polnischer academic of sciences" » "polnische academic of sciences" (Expand Search), "polnischen academic of sciences" (Expand Search), "polnisch academic of sciences" (Expand Search), "polnischer academie of sciences" (Expand Search), "polnischer akademie of sciences" (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 academia of sciences") OR ("polnischer academic of sciences"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"polnischer academia of sciences\") OR (\"polnischer academic of sciences\"))".
• Removing quotes may allow a broader search: (( polnischer academia of sciences ) OR ( polnischer academic of sciences )).
• Adding a wildcard symbol may retrieve word variants: (("polnischer academia of sciences") OR ("polnischer academic of sciences"))*.