Perhaps you should try some spelling variations:
cuu tre » cua tre, cau tren, cau treo
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 dan » hoc dan, so dan, sac dan
anh vi » anh va, anh ve, anh vu
tu sac » tu sach, tu cac, tu san
oc van » hoc van, luoc van, quoc van
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu su kham ((soc dan) OR (oc van)) ((anh vi) OR (hanh vi)) cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu su kham ((soc dan) or (oc van)) ((anh vi) or (hanh vi)) cuu tre*.