Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tinh » thanh binh, nhanh tinh, than kinh
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
tinh cua » trinh cua, sinh cua, tinh chat
dan ban » van ban, can ban, dan ba
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chinh sach) or (chiet tach)) - thanh tinh cua ((bang cong) or (dang cong)) dan ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (chiet tach)) - thanh tinh cua ((bang cong) OR (dang cong)) dan ban cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (chiet tach)) - thanh tinh cua ((bang cong) or (dang cong)) dan ban cau*.