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
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu 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: su sach ky nang ((x hoi) or (xa hoi)). hieu qua pham cua ban hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((x hoi) OR (xa hoi)). hieu qua pham cua ban hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x hoi) or (xa hoi)). hieu qua pham cua ban hanh de cua tre*.