Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
phuong manh » phuong anh, phung manh, phuong danh
hieu sang » chieu sang, hieu lang, hieu quang
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
toan ban » van ban
toan cao » toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - chinh doanh ((cua dung) OR (cua dong)) phuong manh ((toan ban) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - chinh doanh ((cua dung) OR (cua dong)) phuong manh ((toan ban) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - chinh doanh ((cua dung) OR (cua dong)) phuong manh ((toan ban) or (toan cao))*.