Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong anh » cong danh, dong anh, hong anh
tuan tap » toan tap, tuan tai, tuyen tap

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: hoc ((chieu sach) OR (thien hach)) - canh tranh cua nhung cong anh tuan tap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien hach)) - canh tranh cua nhung cong anh tuan tap*.