Perhaps you should try some spelling variations:
qua nang » sua nang, cua nang, qua hang
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
luc va » duc va, tuc va
loc va » hoc 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu qua nang ((luc va) OR (loc va)) hanh dai cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu qua nang ((luc va) OR (loc va)) hanh dai cua te*.