Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
hanh di » hanh vi, hanh de, hang di
luc va » duc va, loc va
tuc va » thuc va, truc va, duc va
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu
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 qua cac ((((luc va) OR (tuc va))) OR (tuc xa)) hanh di cua tu~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu qua cac ((((luc va) or (tuc va))) or (tuc xa)) hanh di cua tu*.