Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nang thanh » dang thanh, tang thanh, nhanh thanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
ban nang » ban hang, van nang, ban dang
san cau » van cau, can cau, ran cau
ban cau » bang cau, ban can, van cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh tinh cua ban nang thanh ((san cau) or (ban cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh tinh cua ban nang thanh ((san cau) OR (ban cau)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh tinh cua ban nang thanh ((san cau) or (ban cau))*.