Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, theo chu, thi chieu
tuong cua » truong cua, huong cua, thong cua
dong cong » duong cong, dung cong, dang cong
khoan cam » khoa cam, khoan va, phan cam
ho chieu » hoc thieu, doi chieu, mot chieu
cua dong » chua dong, cua cong, cua dang
cong ban » cong bang, cong san, cong tan

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