Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
cua triet » cua viet, su triet, va triet
nhan duc » nhan duoc, nhan luc, phan duc
tu sach » thu sach, su sach, tu cach
te sach » toc sach
va nhan » van nhan, ca nhan, va phan
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 sach) OR (te sach)) ky nang x hoi. lieu va nhan duc ((van thanh) OR (ban thanh)) vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang x hoi. lieu va nhan duc ((van thanh) OR (ban thanh)) vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. lieu va nhan duc ((van thanh) OR (ban thanh)) vi cua triet*.