Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xac va » tac va, ac va, bac va
luc va » duc va, tuc va, loc va

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) or (do sanh)) ky lang xa hoi. hieu va cam ((xac va) or (luc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (do sanh)) ky lang xa hoi. hieu va cam ((xac va) OR (luc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (do sanh)) ky lang xa hoi. hieu va cam ((xac va) or (luc va)) hanh vai cua tre*.