Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
ban hanh » ban hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve am » va am

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 xa hoi. hieu ve am thuc ((dat thanh) or (ban hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve am thuc ((dat thanh) OR (ban hanh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ve am thuc ((dat thanh) or (ban hanh)) dai cua tre*.