Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hau thuc » huu thuc, ha thuc, mau thuc
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
van hau » van ha, van hai, van dau
thuc va » thuc vat, thuc dan, thuc day
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: so sach y ((lang xa) or (nang ma)) hoi. hieu van hau thuc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((lang xa) OR (nang ma)) hoi. hieu van hau thuc va thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y ((lang xa) or (nang ma)) hoi. hieu van hau thuc va thanh vi cua tre*.