[Jenda_]

> But in czech language word for Bohemia region is "Czechia" (there is no Bohemia).

No. Bohemia is Čechy, Czechia is Česko.

Yes, they are sometimes confused, and maybe people are unhappy with Česko because it's just too similar to Čechy. People from Moravia and Silesia feel underrepresented when someone mistakenly uses "Čechy" (Bohemia) for the entire Česko (Czechia; Bohemia+Moravia+Silesia).