Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
soc van » hoc van, sac van, soc dan
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
oc van » hoc van, luoc van, quoc van
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu qua cham ((soc van) OR (oc van)) hanh di cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu qua cham ((soc van) OR (oc van)) hanh di cua vat*.