Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cac xuc » cam xuc, chat xuc, cac cuoc
cua tre » cua te, cuu tre, cua triet
tu ban » thu ban, te ban
ban ky » van ky, dan ky
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

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