Perhaps you should try some spelling variations:
phuong thuong » thong thuong, phuong duong, phuong luong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cua phuong » cuu phuong, cuc phuong, luan phuong
mai hoang » thai hoang, mai hung, van hoang
cong cua » cong cu, dong cua, huong cua
mai toan » bai toan, mai tan, manh toan
mai loan » mai lan, mai quan, bai luan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh cong cua phuong thuong ((mai toan) OR (((mai loan) OR (mai hoang)))) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh cong cua phuong thuong ((mai toan) or (((mai loan) OR (mai hoang)))) tap~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh cong cua phuong thuong ((mai toan) or (((mai loan) OR (mai hoang)))) tap*.