Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
cua trung » cua truong, xuan trung, cua nhung
hang ban » hang luan, hang va, hang tai
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
ban cua » ban quan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hang ban cua trung ((cong dan) OR (cong san)) than cap~.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hang ban cua trung ((cong dan) or (cong san)) than cap*.