Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
cham thuc » nham thuc, pham thuc, tham thuc
va cham » va chat, va tham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
xang x » nang x
ca cua » co cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (thuat sach)) ty xang x hoi. lieu va cham thuc ((va danh) OR (va hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ty xang x hoi. lieu va cham thuc ((va danh) OR (va hanh)) ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thuat sach)) ty xang x hoi. lieu va cham thuc ((va danh) OR (va hanh)) ca cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) ty xang x hoi. lieu va cham thuc ((va danh) OR (va hanh)) ca cua tre*.