Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van bac » van ban, van hac, dan bac
van bao » van ban, van dao
do van » dao van, vo van, so 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 ky nang x hoi. hieu ((van bac) OR (van bao)) do van hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van bac) OR (van bao)) do van hanh vi cua triet*.