Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationalen (Expand Search)
nationalesa » nationaleesa (Expand Search), nationalaesa (Expand Search), nationalenesa (Expand Search), nationales (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationalae » nationaleae (Expand Search), nationalaae (Expand Search), nationalenae (Expand Search), nationale (Expand Search), nationala (Expand Search), nationalen (Expand Search)
nationalene » nationaleene (Expand Search), nationalaene (Expand Search), nationalenene (Expand Search), nationalen (Expand Search), nationale (Expand Search), nationaler (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: (national OR ((nationalesa OR nationalae) OR nationalene)) academie of sciences of ukraine~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(national OR ((nationalesa OR nationalae) OR nationalene)) academie of sciences of ukraine".
• Adding a wildcard symbol may retrieve word variants: (national OR ((nationalesa OR nationalae) OR nationalene)) academie of sciences of ukraine*.