Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
te sac » te cac, te san
ve cac » va cac, vien cac
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 sac) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (luoc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) OR (luoc van)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (luoc van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (luoc van)) hanh vi cua tre*.