Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
dinh dao » dinh dat, minh dao, dinh cao
thien va » thien van, tien va, thien tai
su triet » su viet, ve triet
cua tre » cua te, cuu tre, cua triet
va dinh » van dinh, va kinh, va tinh
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va cham » va chat, va tham
su tien » su kien, su hien, tu tieng
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: toc sach ky nang x hoi. thien va cham thuc va dinh dao ((cua tre) or (((su triet) or (su tien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. thien va cham thuc va dinh dao ((cua tre) OR (((su triet) OR (su tien)))).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. thien va cham thuc va dinh dao ((cua tre) or (((su triet) or (su tien))))*.