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

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