Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
van dang » van dong, van dung, van nang
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac
va dang » va nang, va lang, da dang

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 cong ((va dang) OR (van dang)) cong tan ((than cao) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh cong ((va dang) OR (van dang)) cong tan ((than cao) or (than cap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh cong ((va dang) OR (van dang)) cong tan ((than cao) or (than cap))*.