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