Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh qua » tranh cua, thanh qua, trinh qua
cong cong » cong dong, trong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
qua cong » cua cong, qua song, va cong
dan toan » van toan, dan than, xuan toan

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 qua cong cong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh tranh qua cong cong ((dan toan) OR (manh toan)) cau*.