Perhaps you should try some spelling variations:
dien cac » dien cuc, dien sach, dien va
vien cac » vien bach, vien dai, vien da
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho
lo va » lo van, lao va, ly va

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. hieu ((dien cac) or (vien cac)) lo va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((dien cac) OR (vien cac)) lo va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((dien cac) or (vien cac)) lo va hanh vai cua tre*.