Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cham so » cham soc, ham so, cham hoi
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
cham o » cham soc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky tang mai hoi. hieu ve ((cham so) OR (cham o)) ban hanh vi ((cua tre) OR (cuu tre))~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky tang mai hoi. hieu ve ((cham so) or (cham o)) ban hanh vi ((cua tre) or (cuu tre))*.