Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
phan hang » phan dang, phan hong, pham hang
hang luan » tang luan, dung luan
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham toan
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (ha tinh)) - phan hang luan dong cong ((tac toan) OR (tam toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (ha tinh)) - phan hang luan dong cong ((tac toan) OR (tam toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (ha tinh)) - phan hang luan dong cong ((tac toan) OR (tam toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (ha tinh)) - phan hang luan dong cong ((tac toan) OR (tam toan)) ban*.