Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
dan thanh » dang thanh, danh thanh, ban thanh
thuc dan » thuc hanh, hoc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
va cam » va cham, va cac, va cao
nam ky » cam ky
nam ly » nam lay, tam ly, nam lo

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 ((nam ky) OR (nam ly)) ((nang ma) OR (tang ma)) hoi. hieu va cam thuc dan thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((nam ky) OR (nam ly)) ((nang ma) or (tang ma)) hoi. hieu va cam thuc dan thanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((nam ky) OR (nam ly)) ((nang ma) or (tang ma)) hoi. hieu va cam thuc dan thanh vai cua tre*.