Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
loc van » luoc van, hoc van, loc va
van lam » van nam
sach ky » sac ky, sach y, sach ty
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
lo van » le van, vo van, so van

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang ha) OR (van xay)) hoi. hieu van lam ((loc van) OR (lo van)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang ha) or (van xay)) hoi. hieu van lam ((loc van) OR (lo van)) hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang ha) or (van xay)) hoi. hieu van lam ((loc van) OR (lo van)) hanh vai cua tre*.