Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu cach » tu cac
te sach » toc sach
hieu va » lieu va
luc van » luoc van, luu van, duc 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) nang luc van hanh vi cua 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) OR (hieu qua)) nang luc van hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang x hoi. ((hieu va) OR (hieu qua)) nang luc van hanh vi cua triet*.