Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, truong thanh
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
toan cao » toan ban
toan tap » toan ban

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 ((trung tuan) OR (tran tuan)) dung cong tap ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh ((trung tuan) OR (tran tuan)) dung cong tap ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh ((trung tuan) OR (tran tuan)) dung cong tap ((toan cao) or (toan tap))*.