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, xuan toan, dien toan
dan than » dan chan, ban than, van than

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