Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
cong cong » cong dong, trong cong, dung cong
thoai cac » tai cac, thong cac, tho cac
ho chieu » hoc thieu, doi chieu, mot chieu
tinh son » tinh toan, dinh so, tinh hoc
cong ban » cong bang, cong san, cong tan
thai cao » tai cao, thuat cao, toan cao
son cua » song cua, con cua, san cua

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 - tinh son cua cong cong ban ((thai cao) OR (thoai cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) xanh - tinh son cua cong cong ban ((thai cao) OR (thoai cac))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) xanh - tinh son cua cong cong ban ((thai cao) OR (thoai cac))*.