Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
kho tang » cao tang
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
ky tang » ky nang, ky dang, ky trong
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
ve cam » ve cham, ve cac, va cam
su cac » tu cac, su cao, eu cac
su can » su van, su cao, tu can
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) OR (su can)) ((ky tang) or (kho tang)) ma hoi. hieu ve cam duc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (su can)) ((ky tang) OR (kho tang)) ma hoi. hieu ve cam duc ban thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su cac) OR (su can)) ((ky tang) or (kho tang)) ma hoi. hieu ve cam duc ban thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su cac) OR (su can)) ((ky tang) or (kho tang)) ma hoi. hieu ve cam duc ban thanh tai cua tre*.