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
van toan » van tuan, van tan, van thanh

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 ((van 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 ((van toan) OR (manh toan)) ban*.