Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
xa danh » dia danh, nam danh, van danh
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
he nam » ha nam, nghe nam

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: su sach ty nang xa hoi. hieu he nam thu ((xa danh) OR (((va danh) OR (va hanh)))) hoi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu he nam thu ((xa danh) or (((va danh) OR (va hanh)))) hoi va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu he nam thu ((xa danh) or (((va danh) OR (va hanh)))) hoi va triet*.