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

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: tu sach ((y nang) OR (ly nang)) x hoi. ((hieu ve) OR (hieu va)) can thuc va hanh vu va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) x hoi. ((hieu ve) or (hieu va)) can thuc va hanh vu va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (ly nang)) x hoi. ((hieu ve) or (hieu va)) can thuc va hanh vu va triet*.