Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
mai hoi » mai khoi, dai hoi, lai hoi
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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

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