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