Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
ca thuong » cao thuong, cua thuong, va thuong
hua khong » hoa khong, cua khong, hoac khong
hoc hieu » hoc thieu, hoc hien, doc hieu
than ban » thanh ban, toan ban, nhuan ban
than man » than ma, thanh san, tran manh

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 - hanh trinh ((ca thuong) or (hua khong)) huong dan ((than ban) or (than man))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trinh ((ca thuong) OR (hua khong)) huong dan ((than ban) OR (than man)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh ((ca thuong) or (hua khong)) huong dan ((than ban) or (than man))*.