Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ((x hoi) OR (x ho)). hieu ve chat ((xuc van) or (xuc ban)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((x hoi) OR (x ho)). hieu ve chat ((xuc van) OR (xuc ban)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((x hoi) OR (x ho)). hieu ve chat ((xuc van) or (xuc ban)) hanh vi cua tre*".