Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
hanh dai » hanh tai, hanh dao, vanh dai
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
goc va » hoc va, doc va, uoc va
loc va » hoc va, luc va
y nang » ky nang, ly nang, v nang
o hoi » co hoi, o hoc, o hai

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