Hi ba'c Tuan, Ba'c co' bie^'t te^n khoa ho.c cu?a ca' linh kho^ng dde^? to^i co`n hi`nh dung ddu+o+.c ? Hay ddo' la` con bo^'ng ma` ngoa`i Ba('c go.i ? Cheers, Tran Minh Tien