Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh qua » tranh cua, thanh qua, trinh qua
ho chieu » theo chieu, hoc thieu, doi chieu
phan cau » phan dau, phan cac, phan tu
than cap » khan cap, thanh lap, thanh cac

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 qua ((dung cong) OR (dung trong)) dan ((phan cau) OR (than cap))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh tranh qua ((dung cong) or (dung trong)) dan ((phan cau) or (than cap))*.