Perhaps you should try some spelling variations:
dung cong » dung trong
chang cau » nhung cau, hang ca, cong cau
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
tranh ve » trinh ve, thanh ve, tranh va
cong san » cong tac
hang cau » hang dau, hang ca, nhung cau
ve dung » ve duong, ve rung, va 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 cong san ((chang cau) OR (hang cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chu)) xanh - canh tranh ve dung cong san ((chang cau) OR (hang cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chu)) xanh - canh tranh ve dung cong san ((chang cau) OR (hang cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) xanh - canh tranh ve dung cong san ((chang cau) OR (hang cau))*.