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)
nationaleren » nationaleeren (Expand Search), nationalaeren (Expand Search), nationalereren (Expand Search), nationaler (Expand Search), nationale (Expand Search), nationales (Expand Search)
nationaleeren » nationaleeeren (Expand Search), nationalaeeren (Expand Search), nationalereeren (Expand Search), nationaler (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 (nationalen OR (nationaleren OR nationaleeren))) universitat of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(national OR (nationalen OR (nationaleren OR nationaleeren))) universitat of kharkiv".
• Adding a wildcard symbol may retrieve word variants: (national OR (nationalen OR (nationaleren OR nationaleeren))) universitat of kharkiv*.