Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh doanh » hang doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cua nhung » va nhung
cong lang » cong vang, cong luong, cong quang
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 nganh) or (chieu sang)) - hanh doanh cua nhung cong lang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (chieu sang)) - hanh doanh cua nhung cong lang van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) or (chieu sang)) - hanh doanh cua nhung cong lang van ban*.