Perhaps you should try some spelling variations:
thai hoc » dai hoc, bai hoc, hoi hoc
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va thai » van thai, va tai, va tham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, he cac
de cac » den cac, ve cac, de cai
te cao » te bao
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: ((((te cac) or (de cac))) or (te cao)) ky dang xa hoi. hieu va thai hoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((te cac) OR (de cac))) OR (te cao)) ky dang xa hoi. hieu va thai hoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((te cac) or (de cac))) or (te cao)) ky dang xa hoi. hieu va thai hoc va hanh vi cua tre*.