Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu xanh » chieu sach, chieu sang, chieu tinh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
cua thong » cua thuong, cua khong, cua tong
tinh cua » trinh cua, sinh cua, tinh chat
ban hanh » ban hang
ban cau » bang cau, ban can, van cau

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 ((chiet tach) OR (chieu xanh)) - nhanh tinh cua thong thong tin ((ban cau) OR (ban hanh))~.
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (chieu xanh)) - nhanh tinh cua thong thong tin ((ban cau) or (ban hanh))*.