Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chat cua
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
my va » may va, ly va, me va
ky va » ly va, ke va, ky la

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

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