Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach xuc » bach tuoc, bach xuan, bach hue
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
thai cua » than cua, tai cuc, tri cua
sach ky » sach y, sach ty, sach kem
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang co hoc. hieu vien bach xuc ((van hanh) OR (ban hanh)) thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang co hoc. hieu vien bach xuc ((van hanh) OR (ban hanh)) thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang co hoc. hieu vien bach xuc ((van hanh) OR (ban hanh)) thai cua tre*.