Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tong cong » trong cong, cong cong, dung cong
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
tranh ha » thanh ha, trang ha, trinh ha
dan than » dan chan, ban than, van than
ha tong » han tong, ha dong, ha tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - hanh tranh ha tong cong ((dan than) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh tranh ha tong cong ((dan than) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh tranh ha tong cong ((dan than) or (manh toan)) cao*.