Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va triet » va thiet, va trien, cua triet
dam thuc » am thuc, dan thuc, nam thuc
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, dia danh
va dam » van dam, va dao, va dau
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. hieu va dam thuc ((va danh) OR (va hanh)) mai ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu va dam thuc ((va danh) or (va hanh)) mai ((va triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu va dam thuc ((va danh) or (va hanh)) mai ((va triet) OR (ve triet))*.