Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
canh doanh » hanh doanh, chinh doanh, doanh doanh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
doanh cua » doanh luan
hoc hieu » hoc thieu, hoc hien, doc hieu
chan dau » han dau, chan doan, chuan dao
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh doanh cua ((nhung cong) OR (thong cong)) dan ((chan dau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh doanh cua ((nhung cong) OR (thong cong)) dan ((chan dau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - canh doanh cua ((nhung cong) OR (thong cong)) dan ((chan dau) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh doanh cua ((nhung cong) OR (thong cong)) dan ((chan dau) or (phan dau))*.