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