Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
van cua » vang cua, ban cua, dan cua
sach lo » sach dao, sach doi, sach hoi
va cham » va chat, va tham
hieu va » lieu va, hieu qua
lo nang » ho nang, ly nang, loai nang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach lo nang ((x hoi) or (o hoi)). hieu va cham ((xuc va) or (tuc va)) thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach lo nang ((x hoi) OR (o hoi)). hieu va cham ((xuc va) OR (tuc va)) thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach lo nang ((x hoi) or (o hoi)). hieu va cham ((xuc va) or (tuc va)) thanh van cua tre*.