Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ma hoi. hieu qua cam tuc ((va thanh) or (gia thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu qua cam tuc ((va thanh) OR (gia thanh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu qua cam tuc ((va thanh) or (gia thanh)) hai cua tre*.