Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh dan » trinh han, trinh san, trinh da
hung cong » nhung cong, hung cuong, phung cong
hang cong » dang cong, hang nong, bang cong
than phan » thanh phan, toan phan, thanh pham
ho chieu » theo chieu, hoc thieu, mot chieu
phan cac » nhan cach, phan dau, phan lap

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 - trinh dan toc ((hung cong) or (hang cong)) than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - trinh dan toc ((hung cong) OR (hang cong)) than phan cac.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - trinh dan toc ((hung cong) or (hang cong)) than phan cac*.