Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationaler (Expand Search)
nationalea » nationaleea (Expand Search), nationalaea (Expand Search), nationalerea (Expand Search), nationale (Expand Search), nationala (Expand Search), nationaler (Expand Search)
nationaleaena » nationaleeaena (Expand Search), nationalaeaena (Expand Search), nationalereaena (Expand Search), nationaleena (Expand Search), nationalaena (Expand Search), nationalerena (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 (nationalea OR nationaleaena)) OR nationalen) universitat of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((national OR (nationalea OR nationaleaena)) OR nationalen) universitat of kharkiv".
• Adding a wildcard symbol may retrieve word variants: ((national OR (nationalea OR nationaleaena)) OR nationalen) universitat of kharkiv*.