Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
cua tre » cua te, cuu tre, cua triet
xuc van » duc van, luc van, xuc ban
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((ma hoi) or (dai hoi)). ((hieu ve) or (hieu van)) chat xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (dai hoi)). ((hieu ve) OR (hieu van)) chat xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (dai hoi)). ((hieu ve) or (hieu van)) chat xuc van hanh vi cua tre*.