Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
trung cap » truong cao, trung tam
cap dung » ap dung, cao dung, chan dung
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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: ((theo tieu) OR (doi chieu)) xanh - thanh trung cap dung ((cong tan) OR (cong thanh)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (doi chieu)) xanh - thanh trung cap dung ((cong tan) OR (cong thanh)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (doi chieu)) xanh - thanh trung cap dung ((cong tan) OR (cong thanh)) toan tap*.