Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationalen (Expand Search), nationales (Expand Search)
nationaler » nationaleer (Expand Search), nationalener (Expand Search), nationaleser (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationala » nationalea (Expand Search), nationalena (Expand Search), nationalesa (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationaleen » nationaleeen (Expand Search), nationaleneen (Expand Search), nationaleseen (Expand Search), nationalen (Expand Search), nationale (Expand Search), nationales (Expand Search)
nationalenaen » nationaleenaen (Expand Search), nationalenenaen (Expand Search), nationalesenaen (Expand Search), nationalitaten (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 (nationaler OR nationala)) OR (nationaleen OR nationalenaen)) universitat of kharkiv~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((national OR (nationaler OR nationala)) OR (nationaleen OR nationalenaen)) universitat of kharkiv".
• Adding a wildcard symbol may retrieve word variants: ((national OR (nationaler OR nationala)) OR (nationaleen OR nationalenaen)) universitat of kharkiv*.