Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
tong cong » trong cong, cong cong, dung cong
bang song » nang song
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - canh manh cua ((((hang cong) or (tong cong))) or (bang song)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh manh cua ((((hang cong) OR (tong cong))) OR (bang song)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh manh cua ((((hang cong) or (tong cong))) or (bang song)) manh toan ban*.