Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
dan hang » ban hang, van hang, dat hang
hang dau » hang va, hang tai

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 (toc thieu)) xanh - canh trinh va ((nhung cong) OR (dung cong)) dan hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) xanh - canh trinh va ((nhung cong) OR (dung cong)) dan hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (toc thieu)) xanh - canh trinh va ((nhung cong) OR (dung cong)) dan hang dau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) xanh - canh trinh va ((nhung cong) OR (dung cong)) dan hang dau*.