Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau thuc » cau truc, cuu thuc, can thuc
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi
va cau » van cau, va cac, va dau

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((ma hoi) OR (xa hoi)). lieu va cau thuc va hanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) OR (xa hoi)). lieu va cau thuc va hanh dai cua triet*.