Perhaps you should try some spelling variations:
san chang » ban hang, dan chan, van khang
chang cau » hang cau, nhung cau, hang ca
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
cong san » cong tac
ve dung » ve duong, ve rung, te dung
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chu)) xanh - canh tranh ((ve dung) OR (va dung)) cong san chang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chu)) xanh - canh tranh ((ve dung) OR (va dung)) cong san chang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chu)) xanh - canh tranh ((ve dung) OR (va dung)) cong san chang cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) xanh - canh tranh ((ve dung) OR (va dung)) cong san chang cau*.