Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
nang mai » nang tai, lang mai, nang cai
va thanh » gia thanh, ban thanh, va tinh
lam thuc » lam thuoc, am thuc, nam thuc
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan, thuc day
van lam » van nam
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sac ky)) ((nang mai) or (nang ma)) hoi. hieu van lam thuc va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) ((nang mai) OR (nang ma)) hoi. hieu van lam thuc va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) ((nang mai) or (nang ma)) hoi. hieu van lam thuc va thanh vai cua tre*.