Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
nganh nong » nganh cong
hanh tang » hanh trang, anh tang, hanh mang
cua nganh » cua ngan, chuc nganh, cua nhan
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » hoc thieu, doi chieu, mot chieu
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, xuan 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 chieu) or (ho chieu)) sach - hanh tang cua nganh nong ((dan toan) OR (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - hanh tang cua nganh nong ((dan toan) OR (manh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - hanh tang cua nganh nong ((dan toan) OR (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - hanh tang cua nganh nong ((dan toan) OR (manh toan)) ban*.