Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
xuc van » duc van, luc van, xuc ban
ve cham » va cham, ve chat, vu cham
ty dang » ty xang, ky dang, ty hang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
ma hoi » mai hoi, ma hoa, me 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 ty dang ((ma hoi) or (xa hoi)). hieu ((ve cham) or (ve cac)) xuc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty dang ((ma hoi) OR (xa hoi)). hieu ((ve cham) OR (ve cac)) xuc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty dang ((ma hoi) or (xa hoi)). hieu ((ve cham) or (ve cac)) xuc van hanh vai cua tre*.