Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
dai lo » dai ly, dai o, dai ho
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. hieu vien ((dai lo) or (dai so)) ((va danh) or (va thanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu vien ((dai lo) OR (dai so)) ((va danh) OR (va thanh)) lai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu vien ((dai lo) or (dai so)) ((va danh) or (va thanh)) lai cua tre*.