Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
phong cong » phong chong, thong cong, chong cong
hien xanh » hien hanh, hien nhanh, hien khanh
hanh nang » anh nang, ganh nang, hanh mang
cao phong » cac phong, co phong, chau phong
cong hai » cong thai, cong ha, hoang hai
hai toan » bai toan, hai tan, hach toan
toan ban » van ban

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: hoc ((hien xanh) OR (chieu xanh)) - hanh nang cao phong cong hai toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh nang cao phong cong hai toan ban*.