Perhaps you should try some spelling variations:
nationales » nationale (Expand Search), nationalist (Expand Search), nationala (Expand Search)
nationalen » nationale (Expand Search)
nationaleren » nationale (Expand Search), rationalen (Expand Search), nationaleen (Expand Search), nationalaen (Expand Search)
nationaler » nationale (Expand Search), nationala (Expand Search)
academie » akademie (Expand Search), academia (Expand Search), academic (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: (nationales OR (nationalen OR (nationaleren OR nationaler))) academie of sciences of ukraine~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(nationales OR (nationalen OR (nationaleren OR nationaler))) academie of sciences of ukraine".
• Adding a wildcard symbol may retrieve word variants: (nationales OR (nationalen OR (nationaleren OR nationaler))) academie of sciences of ukraine*.