Perhaps you should try some spelling variations:
thi hanh » thi thanh
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi nang
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
x hoi » xa hoi, o hoi, x ho

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: tu sach ky nang x hoi. ((thi van) OR (thi hanh)) am thuc ((va danh) OR (va hanh)) mai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. ((thi van) OR (thi hanh)) am thuc ((va danh) or (va hanh)) mai va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((thi van) OR (thi hanh)) am thuc ((va danh) or (va hanh)) mai va triet*.