Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van nang » van quang, van ban, van dong
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
sach van » sach han, sach va, bach van
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
hieu he » hiem he, hieu le, hieu hien
mai hoi » mai khoi, dai hoi, lai hoi
lai roi » lai hoi, loi roi
vai hoa » van hoa, va hoa, dai hoa

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 van nang ((mai hoi) or (lai roi)). ((hieu he) OR (hieu ve)) nam thuc va thanh vai hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach van nang ((mai hoi) OR (lai roi)). ((hieu he) OR (hieu ve)) nam thuc va thanh vai hoa viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach van nang ((mai hoi) or (lai roi)). ((hieu he) OR (hieu ve)) nam thuc va thanh vai hoa viet*".