Perhaps you should try some spelling variations:
cua triet » su triet, va triet
tham thuc » nham thuc, pham thuc, tam thuc
toc sach » hoc sach, doc sach, thuoc sach
danh dau » lanh dao, hang dau, danh tu
cua viet » ca viet, hoa viet, cua vat
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh

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 tang xa hoi. hieu ve tham thuc va danh dau ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky tang xa hoi. hieu ve tham thuc va danh dau ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang xa hoi. hieu ve tham thuc va danh dau ((cua triet) or (cua viet))*.