Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
hanh thai » nhanh thai, hinh thai, hanh tai
vien cac » vien bach, vien dai, vien da
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ho » nang hoc, nang co, tang ho
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
ho hai » hoc hai, pho hai, cho hai

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 ky nang ho hai. hieu vien cac ((xuc van) or (duc van)) hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ho hai. hieu vien cac ((xuc van) OR (duc van)) hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ho hai. hieu vien cac ((xuc van) or (duc van)) hanh thai cua tre*.