Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
hanh dai » hanh tai, hanh dao, vanh dai
thu sach » tu sach, thuat sach, thuoc sach
van cau » van dau, van hau, van chat
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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: thu sach y nang ((x hoi) OR (o hoi)). thien van cau ((xuc va) OR (tuc va)) hanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((x hoi) OR (o hoi)). thien van cau ((xuc va) or (tuc va)) hanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((x hoi) OR (o hoi)). thien van cau ((xuc va) or (tuc va)) hanh dai cua triet*.