Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cua chat » cua cha, chuan chat, cao chat
chat xuc » chat huu, cam xuc, chao xu
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
va dan » ca dan, va dao, va dau
ca cua » co cua
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
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: tu cai ky sang ma hoi. hieu cua chat xuc ((((va dinh) or (va dan))) or (va hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ky sang ma hoi. hieu cua chat xuc ((((va dinh) OR (va dan))) OR (va hanh)) ca cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cai ky sang ma hoi. hieu cua chat xuc ((((va dinh) or (va dan))) or (va hanh)) ca cua tre*.