Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, cong dong
than cao » toan cao, thai cao, than cap
va nang » van nang, da nang, cam nang

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