Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
tieu sach » chieu sach, dien sach, te sach
hanh tang » hanh trang, anh tang, hanh mang
cac nganh » hoc nganh
manh toan » thanh toan, anh tuan, tinh toan
tang cac » bang cac, hang cac, tang ca
dan toan » van toan, dan than, dien toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh tang cac nganh cong ((((dan toan) OR (xuan toan))) or (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh tang cac nganh cong ((((dan toan) OR (xuan toan))) OR (manh toan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh tang cac nganh cong ((((dan toan) OR (xuan toan))) or (manh toan)) ban*".