Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nuoc sach » nguoi sach, hoc sach, cuoc cach
nham thuc » nhan thuc, nam thuc, nham thu
hanh dai » hanh tai, hanh dao, vanh dai
van nham » van nam, van nhan, van tham
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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: ((su sach) OR (nuoc sach)) ky nang ((x hoi) OR (o hoi)). hieu van nham thuc va hanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (nuoc sach)) ky nang ((x hoi) OR (o hoi)). hieu van nham thuc va hanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (nuoc sach)) ky nang ((x hoi) OR (o hoi)). hieu van nham thuc va hanh dai cua triet*.