Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, nuoc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ty ((nang x) OR (lang xa)) hoi. hieu va cham thuc va hanh di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ty ((nang x) or (lang xa)) hoi. hieu va cham thuc va hanh di cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ty ((nang x) or (lang xa)) hoi. hieu va cham thuc va hanh di cuu tre*.