Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
qua hai » qua hoat
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, eu cac
su can » su van, su cao, tu can
qua ca » qua cac, qua cua, qua cai
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: ((su cac) or (su can)) ky nang xa hoi. hieu ((qua hai) or (qua ca)) duc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su can)) ky nang xa hoi. hieu ((qua hai) OR (qua ca)) duc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (su can)) ky nang xa hoi. hieu ((qua hai) or (qua ca)) duc van hanh vi cua tre*.