Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
nang hanh » nang thanh, dang hanh, nang hang
vien cac » vien bach, vien dai, vien da
tac nang » tac vang, tai nang, tap nang
hoc cac » hoc cao
ky lang » ky dang, ky tang, tay lang
cac tac » cac toc, cac bac, cac dac
cua tre » cua te, cuu tre, cua triet
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: hoc cac ((ky lang) or (ky nang)) xa hoi. hieu vien cac tac nang hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cac ((ky lang) OR (ky nang)) xa hoi. hieu vien cac tac nang hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc cac ((ky lang) or (ky nang)) xa hoi. hieu vien cac tac nang hanh vi cua tre*.