Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung dai » truong dai, truong dao, trung tam
dai khong » dai khoang, dai hong, dai khung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
than cap » khan cap, thanh lap, thanh cac

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) or (thien thanh)) - thanh trung dai khong ((cong tan) or (cong tac)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (thien thanh)) - thanh trung dai khong ((cong tan) OR (cong tac)) than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (thien thanh)) - thanh trung dai khong ((cong tan) or (cong tac)) than cap*.