Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van nhanh » van thanh, van hanh, van nhan
van khanh » van thanh, van hanh, van anh
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
ro hai » co hai, o hai, so 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 ky nang ro hai. hieu vien cac xuc ((van nhanh) or (van khanh)) tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ro hai. hieu vien cac xuc ((van nhanh) OR (van khanh)) tri cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ro hai. hieu vien cac xuc ((van nhanh) or (van khanh)) tri cua tre*.