Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh doanh » hanh doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
chuan dao » chuan doan, chuan iso, chuan ha
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 thieu xanh - canh doanh cua ((nhung cong) OR (hang cong)) dan ((chuan dao) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh doanh cua ((nhung cong) OR (hang cong)) dan ((chuan dao) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - canh doanh cua ((nhung cong) OR (hang cong)) dan ((chuan dao) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh doanh cua ((nhung cong) OR (hang cong)) dan ((chuan dao) or (phan dau))*.