Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va chat » van chat, va phat, cao chat
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
doc va » duoc va, hoc va, duc va
loc va » hoc va, luc va
cua te » cua tu
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 y nang x hoi. lieu va chat ((doc va) or (loc va)) hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. lieu va chat ((doc va) OR (loc va)) hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. lieu va chat ((doc va) or (loc va)) hanh vi ((cua tre) or (cua te))*.