Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang noi
xuc ban » duc ban, cuc ban, quoc ban
duc van » duc va, duc tan, duc manh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
co hai » co dai, co hoi, 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 y nang co hai. hieu vien cac ((xuc ban) or (((duc van) or (suc manh)))) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang co hai. hieu vien cac ((xuc ban) OR (((duc van) OR (suc manh)))) hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang co hai. hieu vien cac ((xuc ban) or (((duc van) or (suc manh)))) hanh tai cua tre*.