Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cac ban » cac dan, cac van, can ban
cua tre » cua te, cuu tre, cua triet
cuc ban » cua ban, cuu ban, duc ban
van cam » van nam, van lam, van cau
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh

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 dang xa hoi. hieu van cam ((cuc ban) OR (cac ban)) ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu van cam ((cuc ban) OR (cac ban)) ((hanh vai) OR (hanh va)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu van cam ((cuc ban) OR (cac ban)) ((hanh vai) or (hanh va)) cua tre*".