Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan vat » nhan va, nhan tai, nhan dan
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
va nhan » van nhan, ca nhan, va phan
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
toc va » hoc va, toc ta, tuc va
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 y nang o hoi. hieu va cac toc va nhan vat cua tre~.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang o hoi. hieu va cac toc va nhan vat cua tre*.