Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, hoc thieu, mot chieu
vung tam » vung tay, trung tam, dung tai
vung tau » dung tai, vung dat, vung va
cong tac » cong ty
tac van » tac vang, cac van, tac 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: ((doi chieu) OR (ho chieu)) xanh - thanh ((vung tam) OR (vung tau)) bang cong tac van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - thanh ((vung tam) OR (vung tau)) bang cong tac van ban~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - thanh ((vung tam) OR (vung tau)) bang cong tac van ban*.