Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
cong cua » cong cu, dong cua, huong cua
cong tac » cong ty
tuan cau » toan cau, quan cau, thuan cam
ban cua » ban quan
tuan cu » tuan tu, quan cua, tuan thu

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 sach - hanh ((cong cua) OR (ban cua)) dung cong tac ((tuan cau) OR (tuan cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((cong cua) or (ban cua)) dung cong tac ((tuan cau) OR (tuan cu))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((cong cua) or (ban cua)) dung cong tac ((tuan cau) OR (tuan cu))*.