Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationaler (Expand Search)
nationalesa » nationaleesa (Expand Search), nationalaesa (Expand Search), nationaleresa (Expand Search), nationales (Expand Search), nationale (Expand Search), nationala (Expand Search)
nationalese » nationaleese (Expand Search), nationalaese (Expand Search), nationalerese (Expand Search), nationales (Expand Search), nationale (Expand Search), nationaler (Expand Search)
nationalen » nationaleen (Expand Search), nationalaen (Expand Search), nationaleren (Expand Search), nationale (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 (nationalese OR nationalen)) universitat of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((national OR nationalesa) OR (nationalese OR nationalen)) universitat of kharkiv".
• Adding a wildcard symbol may retrieve word variants: ((national OR nationalesa) OR (nationalese OR nationalen)) universitat of kharkiv*.