Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationaler (Expand Search)
nationalen » nationaleen (Expand Search), nationalaen (Expand Search), nationaleren (Expand Search), nationale (Expand Search)
nationalenaen » nationaleenaen (Expand Search), nationalaenaen (Expand Search), nationalerenaen (Expand Search), nationaleaen (Expand Search), nationalitaten (Expand Search)
nationalaeren » nationaleaeren (Expand Search), nationalaaeren (Expand Search), nationaleraeren (Expand Search), nationaler (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(national OR ((nationalen OR nationalenaen) OR nationalaeren)) universitat of kharkiv~".
• Adding a wildcard symbol may retrieve word variants: (national OR ((nationalen OR nationalenaen) OR nationalaeren)) universitat of kharkiv*.