Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh luan » trinh luan, trinh luat, doanh luan
hien xanh » hien hanh, hien nhanh, chieu xanh
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
san toan » van toan, dan toan, xuan toan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh luan cong cong ((san toan) OR (manh toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh luan cong cong ((san toan) OR (manh toan)) cao*.