Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doc hieu, doi chi, mot chieu
va phuong » va thuong, cac phuong
ho chieu » theo chieu, hoc thieu, mot chieu
trung va » truong va, trang va, trung ha
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
khan cap » khan ap, than cap, khoan cam

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: ((ho chieu) OR (doi chieu)) xanh - thanh trung va phuong ((cong ban) OR (cong san)) khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - thanh trung va phuong ((cong ban) OR (cong san)) khan cap~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - thanh trung va phuong ((cong ban) OR (cong san)) khan cap*.