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
tranh cua » doanh cua, manh cua
dang dong » dang cong, dung dong, dan dong
dong tinh » dong kinh, dong tin, cong tinh
cua dang » cua cong, cua ban
toan cau » 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 dang dong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tranh cua dang dong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - hanh tranh cua dang dong tinh toan cau*.