Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
thanh toan » thanh hoa, thanh san, tinh toan
tranh cua » doanh cua, manh cua
dong dong » dong duong, cong dong, song dong
dung dong » dung cong, vung dong, dung trong
toan cao » toan ban, toan 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 (chieu sang)) - hanh tranh cua ((dong dong) OR (dung dong)) thanh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tranh cua ((dong dong) OR (dung dong)) thanh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - hanh tranh cua ((dong dong) OR (dung dong)) thanh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - hanh tranh cua ((dong dong) OR (dung dong)) thanh toan cao*.