Perhaps you should try some spelling variations:
vanh tai » van tai, hanh tai, anh tai
tai cua » thai cua, tai cuc, tri cua
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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: te ((sach ky) OR (sach y)) nang x hoi. hieu va cam ((xuc va) OR (luc va)) vanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) nang x hoi. hieu va cam ((xuc va) or (luc va)) vanh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) nang x hoi. hieu va cam ((xuc va) or (luc va)) vanh tai cua tre*.