Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thu sach » tu sach, thuat sach, thuoc sach
vien cac » vien bach, vien dai, vien da
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ky nang xa hoi. hieu vien cac duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky nang xa hoi. hieu vien cac duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky nang xa hoi. hieu vien cac duc va hanh vai cua tre*.