Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
thai cua » than cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
dua ban » dia ban, qua ban, mua ban
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ve cham » va cham, ve chat, vu cham
su cac » tu cac, su cao, su can
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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

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