Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
danh vai » danh sai, danh va, doanh van
bach lao » bach mao, bach giao, bach mai
tu sach » thu sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
lao va » tao va, cao va, bao va
x hoi » xa hoi, x ho, 5 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) or (su sach)) ky nang ((x hoi) or (o hoi)). hieu vien bach lao va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((x hoi) OR (o hoi)). hieu vien bach lao va danh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((x hoi) or (o hoi)). hieu vien bach lao va danh vai cua tre*.