Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
dien sach » dien anh
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
cong anh » cong danh, dong anh, cong thanh
hong anh » hoang anh, hong hanh, dong anh
tuan tap » toan tap, tuan tai, tuyen tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (dien sach)) - hanh tranh cua dung ((cong anh) OR (hong anh)) tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (dien sach)) - hanh tranh cua dung ((cong anh) OR (hong anh)) tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (dien sach)) - hanh tranh cua dung ((cong anh) OR (hong anh)) tuan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (dien sach)) - hanh tranh cua dung ((cong anh) OR (hong anh)) tuan tap*.