Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
hanh tai » thanh tai, hang tai, han tai
va cham » va chat, va tham
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
goc va » hoc va, doc va, uoc va
loc va » hoc va, luc va
x hoi » xa hoi, o hoi, x ho

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) or (thuoc sach)) v nang x hoi. lieu va cham ((goc va) or (loc va)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) v nang x hoi. lieu va cham ((goc va) OR (loc va)) hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) v nang x hoi. lieu va cham ((goc va) or (loc va)) hanh tai cua tre*.