Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
ban thai » ban than, ban thi, ban tai
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
qua hau » qua hai, qua bau, qua dau
hau xuc » chat xuc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
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: tu sach tru nang o hoi. hieu qua hau xuc van ban thai cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang o hoi. hieu qua hau xuc van ban thai cua tre*.