Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
kmay nang » ky nang, kha nang, may nong
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
may nang » may nong, ky nang, cam nang
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
cua tre » cua te, cuu tre, cua triet
co loi » co hoi
o hoi » co hoi, o hoc, 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 ((may nang) or (kmay nang)) ((o hoi) or (co loi)). hieu vien cac luc van hanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((may nang) OR (kmay nang)) ((o hoi) OR (co loi)). hieu vien cac luc van hanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((may nang) or (kmay nang)) ((o hoi) or (co loi)). hieu vien cac luc van hanh thai cua tre*.