Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
hach toan » thanh toan, manh toan
hang cua » mang cua, hang ca, huong cua
hang tai » hang va, dung tai
tac toan » tap toan, tam toan, tich toan

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 - hanh ((hang cua) or (hang tai)) hang cong ((tac toan) OR (hach toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((hang cua) OR (hang tai)) hang cong ((tac toan) OR (hach toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((hang cua) or (hang tai)) hang cong ((tac toan) OR (hach toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((hang cua) or (hang tai)) hang cong ((tac toan) OR (hach toan)) ban*.