Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
quang dung » quang trung, ung dung, cuong dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
doc hieu » toc thieu, hoc thieu, hoc hien
qua dung » su dung, qua song, qua cong
san chan » san chang, dan chan, ban chan
san chay » san pham, van chat, dan chan

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 doanh ((qua dung) OR (quang dung)) cong ((san chan) or (san chay)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh doanh ((qua dung) OR (quang dung)) cong ((san chan) OR (san chay)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - hanh doanh ((qua dung) OR (quang dung)) cong ((san chan) or (san chay)) tap".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh doanh ((qua dung) OR (quang dung)) cong ((san chan) or (san chay)) tap*.