Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than

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: ho chieu xanh - hanh tranh cua ((tong cong) OR (dung cong)) ((van toan) OR (dan than)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh tranh cua ((tong cong) or (dung cong)) ((van toan) or (dan than)) cau*.