Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
qua cham » qua hai, qua cac, va cham
so sach » so sanh, bo sach, co sach
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
su hien » su kien, su tien, thu hien
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang mai khoi. hieu qua cham thuc va hanh vi ((cua triet) OR (su hien))~.
• Adding a wildcard symbol may retrieve word variants: so sach y nang mai khoi. hieu qua cham thuc va hanh vi ((cua triet) or (su hien))*.