Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, thi chieu
duong manh » duong van
trung cua » truong cua, trung tuan, trung cap
cua tuong » cua truong, cua thuong, cua huong
theo chu » cho chu, chao chu, theo yeu
toan ban » van ban

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) OR (theo chu)) sach - thanh trung cua tuong duong manh ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sach - thanh trung cua tuong duong manh ((toan tap) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - thanh trung cua tuong duong manh ((toan tap) or (toan ban))*.