Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
thanh te » thanh ve, thanh de, thanh le
thuc day » thuc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ve cac » va cac, vien cac
te cua » tue cua, le cua, de cua
tu cai » tu cac, tu can, tu bai
ve cam » ve cham, va cam, ve cai
tu ban » thu ban, te ban

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: ((tu cai) OR (tu ban)) ky nang ma hoa. hieu ((ve cam) OR (ve cac)) thuc day thanh te cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu cai) or (tu ban)) ky nang ma hoa. hieu ((ve cam) or (ve cac)) thuc day thanh te cua tre*.