Perhaps you should try some spelling variations:
thieu nien » thien nhien
hieu hien » bieu hien, dieu hien, chieu chien
cach bao » cach nao, sach bao, cach giao
hanh doi » thanh doi, hanh noi, hang doi
tu sach » thu sach, su sach, te sach
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cac ban » cac dan, cac van, can ban
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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. ((thieu nien) or (hieu hien)) ((cac ban) or (cach bao)) va hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((thieu nien) OR (hieu hien)) ((cac ban) OR (cach bao)) va hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((thieu nien) or (hieu hien)) ((cac ban) or (cach bao)) va hanh doi cua tre*.