Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu su » hieu sau, tieu su, hieu so
su kham » su pham, vu kham, so kham
soc van » hoc van, sac van, soc dan
cua tre » cua te, cuu tre, cua triet
oc van » hoc van, luoc van, quoc van
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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 ky nang xa hoi. hieu su kham ((soc van) or (oc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu su kham ((soc van) OR (oc van)) anh vi cua tre*.