Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
tang hanh » tang thanh, dang hanh, nang hanh
vien cac » vien bach, vien dai, vien da
tay tang » tay lang, tay trung, tay quang
hoc cac » hoc cao
ky lang » ky dang, ky tang, tay lang
cac tay » cac cay, cac tac, cac tai
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 tay tang 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 tay tang hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc cac ((ky lang) or (ky nang)) xa hoi. hieu vien cac tay tang hanh vi cua tre*.