Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, trung cap
cua nong » cua cong, cuu nong, cua dong
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh trung cua nong ((cong dan) or (cong tac)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung cua nong ((cong dan) OR (cong tac)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung cua nong ((cong dan) or (cong tac)) than cau*.