Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
tran tap » toan tap, tran tan, tran tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh doanh luan ((thong cong) OR (tong cong)) tan tran tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - hanh doanh luan ((thong cong) or (tong cong)) tan tran tap~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - hanh doanh luan ((thong cong) or (tong cong)) tan tran tap*.