Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationalen (Expand Search), nation (Expand Search)
nationala » nationalea (Expand Search), nationalena (Expand Search), nationa (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationalaaer » nationaleaaer (Expand Search), nationalenaaer (Expand Search), nationaaer (Expand Search), nationaleaer (Expand Search), nationalenaer (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationales » nationalees (Expand Search), nationalenes (Expand Search), nationes (Expand Search), nationale (Expand Search), nationalen (Expand Search), nationalist (Expand Search)
nationaler » nationaleer (Expand Search), nationalener (Expand Search), nationer (Expand Search), nationale (Expand Search), nationalen (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 nationala) OR nationalaaer) OR (nationales OR nationaler)) universitat of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((national OR nationala) OR nationalaaer) OR (nationales OR nationaler)) universitat of kharkiv".
• Adding a wildcard symbol may retrieve word variants: (((national OR nationala) OR nationalaaer) OR (nationales OR nationaler)) universitat of kharkiv*.