Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
tu cach » tu cac
te sach » toc sach
hieu va » lieu va, hieu qua
va nang » van nang, da nang, cam nang
luc van » luoc van, luu van, duc van
x hoi » xa hoi, o hoi, x ho

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 cach) OR (te sach)) ky nang x hoi. hieu va nang luc van hanh vi ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang x hoi. hieu va nang luc van hanh vi ((cua triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang x hoi. hieu va nang luc van hanh vi ((cua triet) OR (va triet))*.