Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thang long » thanh cong
tran tuan » tran xuan, tran quang, tran thanh
long sang » luong sang, long liang, long quang
sang than » cang thang, dang thanh, sang tao
ho chieu » theo chieu, hoc thieu, mot chieu
than cau » toan cau, phan cau, than cap

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 tam) or (tran tuan)) thang long sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung tam) OR (tran tuan)) thang long sang than cau*.