Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ban bo » can bo, ban do, ban co
bo van » vo van, so van, do van
vi cua » vai cua, di cua
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) OR (su sach)) y nang x hoi. hieu van ban bo van hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y nang x hoi. hieu van ban bo van hanh vi cua triet*.