Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
tap toan » tap doan, tap quan, bai toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh tranh cua dung trong ((tap toan) or (van toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh tranh cua dung trong ((tap toan) OR (van toan)) ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh tranh cua dung trong ((tap toan) or (van toan)) ban*.