Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
tu ban » thu ban, te ban
ban ky » van ky, dan ky
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 ((van hanh) or (ban hanh)) vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky nang x hoi. hieu van cac xuc ((van hanh) OR (ban hanh)) vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky nang x hoi. hieu van cac xuc ((van hanh) or (ban hanh)) vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang x hoi. hieu van cac xuc ((van hanh) or (ban hanh)) vi ((cua tre) OR (cuu tre))*.