Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
doanh cua » doanh luan
lang van » dang van, tang van, hoang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (chieu sang)) - hanh doanh cua ((nhung cong) OR (thong cong)) lang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu sang)) - hanh doanh cua ((nhung cong) OR (thong cong)) lang van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (chieu sang)) - hanh doanh cua ((nhung cong) OR (thong cong)) lang van ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu sang)) - hanh doanh cua ((nhung cong) OR (thong cong)) lang van ban*.