Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
trung cao » truong cao, trung cap, trung co
cong hoan » dong hoa, cong san, cong ha
ho chieu » theo chieu, hoc thieu, doi chieu
cong hoa » dong hoa, dong hoc, hang hoa
tan cao » toan cao, tay cao, tan ca
tao cao » bao cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh trung cao ((cong hoan) or (cong hoa)) van ((tan cao) or (tao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung cao ((cong hoan) OR (cong hoa)) van ((tan cao) OR (tao cao)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung cao ((cong hoan) or (cong hoa)) van ((tan cao) or (tao cao))*.