Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
mot chieu » doi chieu, ho chieu
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban
san va » san van, ban va, dan va

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: ((mot chieu) OR (theo chieu)) sang - thanh san va nhung cong tan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) sang - thanh san va nhung cong tan ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) sang - thanh san va nhung cong tan ((toan cao) OR (toan tap))*.