Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
trong tan » trong quan, trong cac, trong ca
cua dung » cua dang, cua dong, qua dung
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh tranh ((cua dung) or (cua cong)) trong tan ((tran cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh tranh ((cua dung) OR (cua cong)) trong tan ((tran cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh tranh ((cua dung) or (cua cong)) trong tan ((tran cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh tranh ((cua dung) or (cua cong)) trong tan ((tran cau) OR (toan cau))*.