Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
cong cong » cong dong, trong cong, dung cong
cong tac » cong ty
tac cong » tac chong, cac cong, tac dong
tan chan » dan chan, can chan, tam chan
ban chan » dan chan, ban than, ban nhan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (theo chieu)) xanh - thanh cong tac cong cong ((tan chan) OR (ban chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (theo chieu)) xanh - thanh cong tac cong cong ((tan chan) OR (ban chan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (theo chieu)) xanh - thanh cong tac cong cong ((tan chan) OR (ban chan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (theo chieu)) xanh - thanh cong tac cong cong ((tan chan) OR (ban chan)) cao*.