Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
luan tong » luan tuong, luan cong, luan dong
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.

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