Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
doc sach » hoc sach, toc sach, dac sac
hoan hai » hoang hai, hoan hao, doan hai
van hoan » van hoang, van hoa, van toan
va chat » van chat, va phat, cao chat
hai cua » thai cua, dai cua, hoi cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
va cham » va tham
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (nuoc sach)) y nang ma hoi. lieu ((va cham) OR (va chat)) xuc van hoan hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (nuoc sach)) y nang ma hoi. lieu ((va cham) or (va chat)) xuc van hoan hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (nuoc sach)) y nang ma hoi. lieu ((va cham) or (va chat)) xuc van hoan hai cua tre*.