Perhaps you should try some spelling variations:
nam thuc » nam thuoc, nam thu, nam tu
toc sach » hoc sach, doc sach, thuoc sach
danh tai » doanh tai, dinh tai, hanh tai
lang hoa » hang hoa, lang ha, nang hoa
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, va hanh
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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