Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationales (Expand Search)
nationaler » nationaleer (Expand Search), nationalaer (Expand Search), nationaleser (Expand Search), nationale (Expand Search), nationala (Expand Search)
nationalen » nationaleen (Expand Search), nationalaen (Expand Search), nationalesen (Expand Search), nationale (Expand Search)
nationalenaen » nationaleenaen (Expand Search), nationalaenaen (Expand Search), nationalesenaen (Expand Search), nationaleaen (Expand Search), nationalitaten (Expand Search)
rationalen » nationale (Expand Search), nationales (Expand Search)
university » universitat (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 nationaler) OR nationalen) OR (rationalen OR nationalenaen)) university of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((national OR nationaler) OR nationalen) OR (rationalen OR nationalenaen)) university of kharkiv".
• Adding a wildcard symbol may retrieve word variants: (((national OR nationaler) OR nationalen) OR (rationalen OR nationalenaen)) university of kharkiv*.