Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, hieu ve
hac thuc » hoc thuc, ha thuc, thach thuc
vat hanh » vat thanh, van hanh, va hanh
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
y nang » ky nang, ly nang, v nang
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (co sach)) y nang x hoi. ((hieu van) OR (lieu va)) hac thuc vat hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (co sach)) y nang x hoi. ((hieu van) OR (lieu va)) hac thuc vat hanh vi cua triet*.