Perhaps you should try some spelling variations:
tranh luan » trinh luat, doanh luan, tang luan
trinh luan » trinh luat, trinh quan, trinh han
hien xanh » hien hanh, hien nhanh, chieu xanh
tong cong » trong cong, cong cong, dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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) OR (trinh luan)) tong cong san toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tranh luan) OR (trinh luan)) tong cong san toan cao*.