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