Perhaps you should try some spelling variations:
qua pham » quan pham, quy pham, qua cham
pham cua » pham ca, phat cua, ham cua
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
de cuu » de cua
x hoi » o hoi, x ho, 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: tu sach ky nang ((x hoi) or (xa hoi)). hieu qua pham cua ban hanh de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). hieu qua pham cua ban hanh de cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (xa hoi)). hieu qua pham cua ban hanh de cuu tre*.