Languages world

Tu be toi da duoc nghe va thich mot cau noi noi tieng rang "Doi la bien ca, ai khong boi se chim" vang chung ta dang song trong mot the gioi nang dong va hoi nhap, va kho tang tri thuc la kho bau quy gia ma moi nguoi chung ta nen hoan thien no va bo sung no de kho bau tri thuc do khong bao gio can kiet. Song co the can, nui co the mon nhung kho bau tri thuc cua chung ta se mai mai khong the can.