Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
nam danh » nam dinh, nam dan
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu he » hieu ve, hiem he, hieu le
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
xa danh » va danh, dia danh, van danh
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: tu sach ty nang xa hoi. hieu he nam thu ((xa danh) OR (nam danh)) sai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu he nam thu ((xa danh) OR (nam danh)) sai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu he nam thu ((xa danh) OR (nam danh)) sai ((cua triet) or (cua viet))*.