Perhaps you should try some spelling variations:
national » nationale (Expand Search), nationala (Expand Search), nationalen (Expand Search)
nationalese » nationaleese (Expand Search), nationalaese (Expand Search), nationalenese (Expand Search), nationales (Expand Search), nationale (Expand Search), nationalen (Expand Search)
nationaler » nationaleer (Expand Search), nationalaer (Expand Search), nationalener (Expand Search), nationale (Expand Search), nationalen (Expand Search), nationala (Expand Search)
academie » academia (Expand Search), academic (Expand Search)
akademie » akademiker (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((national OR nationalese) OR nationaler) (academie OR akademie) of sciences of ukraine~".
• Adding a wildcard symbol may retrieve word variants: ((national OR nationalese) OR nationaler) (academie OR akademie) of sciences of ukraine*.