Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
hanh di » hanh de, hang di, danh di
ve ban » te ban, va ban, ve bao
ban bo » can bo, ban do, ban co
bo van » vo van, so van, do van
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ve ban bo van ((hanh di) OR (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ve ban bo van ((hanh di) OR (hanh vi)) cua triet*.