Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tung » thanh cong
doanh phan » doanh nhan, doan phan, doanh thanh
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu sang)) - thanh tung cua ((tong cong) OR (dung cong)) doanh phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - thanh tung cua ((tong cong) OR (dung cong)) doanh phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - thanh tung cua ((tong cong) OR (dung cong)) doanh phan cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - thanh tung cua ((tong cong) OR (dung cong)) doanh phan cac*.