Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, danh trung
manh trung » manh tung, thanh trung, manh hung
thanh chau » thanh cham, thanh chu, thanh hai
hoc chieu » hoc thieu, ho chieu, hoc hien
thanh cha » thanh ha, thanh nha, thanh phan
dong tac » cong tac, dong tai, dong bac

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 trung) or (manh trung)) cua cong dong tac ((thanh chau) OR (thanh cha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh trung) OR (manh trung)) cua cong dong tac ((thanh chau) OR (thanh cha)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((hanh trung) or (manh trung)) cua cong dong tac ((thanh chau) OR (thanh cha))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh trung) or (manh trung)) cua cong dong tac ((thanh chau) OR (thanh cha))*.