Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
tu sach » thu sach, su sach, te sach
van cac » van hac, van cau, van bac
van hai » van ha, van chat, van hanh
dac ban » cac ban, dac san, duc ban
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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 ((y nang) or (v nang)) x ho. hieu ((van cac) or (van hai)) dac ban thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) x ho. hieu ((van cac) OR (van hai)) dac ban thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) x ho. hieu ((van cac) or (van hai)) dac ban thanh hai cua tre*.