Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
thanh tung » thanh cong
cong doanh » cong danh, cong doan, dong doanh
doanh phan » doanh nhan, doan phan, doanh thanh
hieu lang » chieu sang, hieu quang, nhieu tang
dong cong » duong cong, dung cong, dang cong
tung cua » trung cua, tuong cua, dung cua
cua dong » chua dong, cua cong, cua dang
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 (chinh sach))) or (hieu lang)) - thanh tung cua dong cong doanh phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sach) OR (chinh sach))) OR (hieu lang)) - thanh tung cua dong cong doanh phan cac.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sach) or (chinh sach))) or (hieu lang)) - thanh tung cua dong cong doanh phan cac*.