Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
bang than » bang thanh, ban than, bang nhan
sang than » cang thang, dang thanh, sang tao
ho chieu » theo chieu, hoc thieu, doi chieu
cua tong » cua cong, cua dong, cua song
cua nong » cua cong, cuu nong, cua dong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung ((cua tong) OR (cua nong)) cuong ((bang than) OR (sang than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh trung ((cua tong) or (cua nong)) cuong ((bang than) OR (sang than)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung ((cua tong) or (cua nong)) cuong ((bang than) OR (sang than)) cau*.