Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
qua cam » qua cham, qua cac, qua ca
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
ca cua » co cua

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

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