Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
qua cham » qua hai, qua cac, va cham
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ve hanh » ve thanh, ve canh, va hanh
cua tre » cua te, cuu tre, cua triet
cuu ve » cuu va
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((x hoi) or (x ho)). hieu qua cham cuu ve hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((x hoi) OR (x ho)). hieu qua cham cuu ve hanh dai cua tre*.