Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
canh trinh » canh tranh, hanh trinh, canh tinh
hang cong » dang cong, hang nong, bang cong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
trinh va » trinh van, trinh vat, trinh ve
phan cau » phan dau, phan cac, phan tu
va hang » van hang, va nang, va lang

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) OR (theo tieu)) sach - canh trinh va hang cong toan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo tieu)) sach - canh trinh va hang cong toan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo tieu)) sach - canh trinh va hang cong toan phan cau*.