Perhaps you should try some spelling variations:
can thuc » dan thuc, van thuc, cay thuc
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

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 x hoi. ((hieu ve) OR (hieu va)) can thuc va hanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu ve) OR (hieu va)) can thuc va hanh vi va triet*.