Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hang hang » nang hang, cang thang, hung thang
cuong tac » tuong tac, cuong cac, cuong tap
quang cao » nang cao, quang nam
cong tac » cong ty
quan cau » toan cau, quan ha, quan cua

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 - hang hang va nhung ((cuong tac) OR (cong tac)) ((quan cau) OR (quang cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - hang hang va nhung ((cuong tac) or (cong tac)) ((quan cau) OR (quang cao))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - hang hang va nhung ((cuong tac) or (cong tac)) ((quan cau) OR (quang cao))*.