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