Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
nang xa » lang xa, nang ma, mang xa
sach ky » sac ky, sach ty, sach kem
van lam » van nam
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach y)) ((nang xa) or (nang x)) hoi. hieu van lam thuc va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) ((nang xa) OR (nang x)) hoi. hieu van lam thuc va tinh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach y)) ((nang xa) or (nang x)) hoi. hieu van lam thuc va tinh vi cua tre*".