Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
dung cong » dung trong
tran chau » tranh chap, tran huu
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho
cong tan » cong tac, cong san, cong thanh
tran cau » toan cau, ran cau, tra cau

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 ((tung cua) OR (dung cua)) dung cong tan ((tran cau) OR (tran chau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - thanh ((tung cua) or (dung cua)) dung cong tan ((tran cau) OR (tran chau))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - thanh ((tung cua) or (dung cua)) dung cong tan ((tran cau) OR (tran chau))*.