Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trung cua » truong cua, trung tuan, trung cap
khoan cam » khoa cam, khoan va, phan cam
thanh lap » thanh san, phan lap, thanh hai
cua tong » cua cong, cua dong, cua nong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac

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 chieu xanh - thanh trung cua tong ((cong ban) OR (cong san)) ((khoan cam) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh trung cua tong ((cong ban) OR (cong san)) ((khoan cam) or (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh trung cua tong ((cong ban) OR (cong san)) ((khoan cam) or (thanh lap))*.