Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
doanh cua » doanh luan
hoc hieu » hoc thieu, hoc hien, doc hieu
manh cua » ban cua
ban cong » bang cong, van cong, phan cong
dan toan » van toan, manh toan, xuan 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 hieu manh - canh ((doanh cua) or (manh cua)) ban cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh ((doanh cua) OR (manh cua)) ban cong ((dan toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh ((doanh cua) or (manh cua)) ban cong ((dan toan) or (dan than)) cau*.