Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
ban hanh » ban hang
cau cuc » cau cua, cau luc, cau truc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
vi cua » vai cua, di cua
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang o hai. ((hieu van) OR (lieu va)) cau cuc ban hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang o hai. ((hieu van) OR (lieu va)) cau cuc ban hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang o hai. ((hieu van) OR (lieu va)) cau cuc ban hanh vi cua tre*.