Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quang toan » quang tuan, quang tran, quang doan
cong chuc » cong thuc, cong cu, cong cua
chuc dung » thuc dung, thuoc dung, chuc nang
dung cong » dung trong
vang toan » van toan, dang toan, vang trang
ho chieu » theo chieu, hoc thieu, doi chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh cong chuc dung cong ((vang toan) OR (quang toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh cong chuc dung cong ((vang toan) OR (quang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong chuc dung cong ((vang toan) OR (quang toan)) cau*.