Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang ((ma hoi) or (ma hoa)). hieu ve cam duc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang ((ma hoi) OR (ma hoa)). hieu ve cam duc ban thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky tang ((ma hoi) or (ma hoa)). hieu ve cam duc ban thanh tai cua tre*.