Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
qua cham » qua hai, qua cac, va cham
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
su can » su van, tu can, su han
su cao » cu cao, vu cao, su co
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua

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: ((su can) OR (su cao)) ky lang ha hoi. hieu qua cham thuc van hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((su can) or (su cao)) ky lang ha hoi. hieu qua cham thuc van hanh vi cua tre*.