Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh sai » hanh san, hanh tai, danh sai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu ha » hieu hoa, hieu ca, hieu xa
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sai cua » dai cua, hai cua, lai cua
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 ky nang ma hoa. ((hieu ha) OR (hieu va)) nam thuc va hanh sai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoa. ((hieu ha) OR (hieu va)) nam thuc va hanh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoa. ((hieu ha) OR (hieu va)) nam thuc va hanh sai cua tre*.