Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
manh trung » manh tung, thanh trung, manh hung
cao thuong » cao truong, ca thuong, cho thuong
trung cao » truong cao, trung cap, trung co
cong dan » cong san, cong tan, cong dong
chat ban » nhat ban, chat ran, cua ban

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) OR (chiet tach)) - manh trung cao thuong ((cong dan) or (huong dan)) chat ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - manh trung cao thuong ((cong dan) OR (huong dan)) chat ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - manh trung cao thuong ((cong dan) or (huong dan)) chat ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - manh trung cao thuong ((cong dan) or (huong dan)) chat ban*.