Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
qua cam » qua cham, qua cac, qua ca
ky tang » ky nang, ky dang, kho tang
dan ky » van ky
ma hoi » xa hoi, ma hoa, me hoi
ca cua » co cua
tu dan » tuc dan, tu ban, cu dan

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