Perhaps you should try some spelling variations:
thanh trung » thanh tung
dong thanh » truong thanh
doi chieu » doc hieu, doi chi, mot chieu
trung tac » trung tam, trong tac, trung tai
ho chieu » theo chieu, hoc thieu, mot chieu
tac dung » sach dung, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) tinh - thanh trung tac dung ((cong tan) or (dong thanh)) ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - thanh trung tac dung ((cong tan) OR (dong thanh)) ran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tinh - thanh trung tac dung ((cong tan) or (dong thanh)) ran cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tinh - thanh trung tac dung ((cong tan) or (dong thanh)) ran cau*.