Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cong doanh » cong danh, cong doan, rong doanh
dong doanh » dung doanh, trong doanh, doanh doanh
hieu lang » chieu sang, hieu quang, nhieu tang
tung cua » trung cua, tuong cua, dung cua
cua tong » cua cong, cua dong, cua nong
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 (hieu lang)) - thanh tung cua tong ((cong doanh) OR (dong doanh)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - thanh tung cua tong ((cong doanh) OR (dong doanh)) phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (hieu lang)) - thanh tung cua tong ((cong doanh) OR (dong doanh)) phan cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - thanh tung cua tong ((cong doanh) OR (dong doanh)) phan cac*.