Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
dung cong » dung trong
trinh ve » trinh he, trinh vi, trinh viet
trinh va » trinh van, trinh vat, trinh vi
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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 (theo tieu)) xanh - canh ((trinh ve) OR (trinh va)) dung cong ban than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo tieu)) xanh - canh ((trinh ve) or (trinh va)) dung cong ban than cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo tieu)) xanh - canh ((trinh ve) or (trinh va)) dung cong ban than cau*.