Perhaps you should try some spelling variations:
van thai » van thoai, van tai, van hai
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
va tai » va tac
va tap » va tac
son va » song va, son la, lon va
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 ky dang xa hoi. hieu ((van thai) or (((va tai) OR (va tap)))) son va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky dang xa hoi. hieu ((van thai) OR (((va tai) OR (va tap)))) son va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky dang xa hoi. hieu ((van thai) or (((va tai) OR (va tap)))) son va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te cac ky dang xa hoi. hieu ((van thai) or (((va tai) OR (va tap)))) son va hanh vi cua tre*.