Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
mai hoi » mai khoi, dai hoi, lai hoi
hieu de » hieu ve, hieu he, hieu le
de chay » de thay, xe chay, diem chay
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((ma hoi) or (mai hoi)). hieu de chay dua ban hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (mai hoi)). hieu de chay dua ban hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (mai hoi)). hieu de chay dua ban hanh vi ((cua tre) or (cua triet))*.