Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
tri nang » thi nang, tra nang, tri bang
xuc van » duc van, luc van, vuc van
hanh di » hanh de, hang di, danh di
hieu va » lieu va, hieu qua
co xuc » co xuoc, co xua
x hoi » xa hoi, o hoi, x ho
va co » vo co

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