Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
loc va » luc va
di cua » dai cua, doi cua, de cua
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: ((tu sach) or (thuoc sach)) y nang x hoi. lieu va cham ((hoc va) or (loc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) y nang x hoi. lieu va cham ((hoc va) OR (loc va)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) y nang x hoi. lieu va cham ((hoc va) or (loc va)) hanh di cua tre*.