Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
tuan trong » thuan trong, quan trong, toan trong
tran trong » gian trong, quan trong, tran hong
dung doanh » dung dan, dung dong
doi chieu » doc hieu, doi chi, ho chieu
phan cau » phan dau, phan cac, phan lap

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 - thanh tung ((tuan trong) OR (tran trong)) dung doanh ((phan cau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh tung ((tuan trong) OR (tran trong)) dung doanh ((phan cau) or (phan tu))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung ((tuan trong) OR (tran trong)) dung doanh ((phan cau) or (phan tu))*.