Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
danh tai » doanh tai, dinh tai, hanh tai
cam thuc » am thuc, nam thuc, cam thu
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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

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