Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
qua cham » qua hai, qua cac, va cham
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cao hoa » cao hoat, cao khoa, cau hoa
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang cao hoa. hieu qua cham thuc ((va hanh) OR (va danh)) vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang cao hoa. hieu qua cham thuc ((va hanh) OR (va danh)) vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang cao hoa. hieu qua cham thuc ((va hanh) OR (va danh)) vi ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang cao hoa. hieu qua cham thuc ((va hanh) OR (va danh)) vi ((cua triet) or (su triet))*.