Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
bach tuoc » sach duoc, sach nuoc
van thanh » ban thanh, van tuan
tuoc van » luoc van, quoc van, thuoc von
thanh ho » thanh pho, thanh hoa, thanh hoc
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
ho cua » hoc cua, hoi cua, hoa cua
o hoc » co hoc, mo hoc, so hoc

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 ((ty nang) or (ty xang)) o hoc. hieu vien bach tuoc van thanh ho cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) o hoc. hieu vien bach tuoc van thanh ho cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) o hoc. hieu vien bach tuoc van thanh ho cua tre*.