Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ly van » le van, ly va, ly von
vi cua » vai cua, di cua
y van » ty van, _ van, b van

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 ((y van) OR (ly van)) xay hoi. hieu van nam thuc ((va hanh) OR (va danh)) vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y van) OR (ly van)) xay hoi. hieu van nam thuc ((va hanh) or (va danh)) vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y van) OR (ly van)) xay hoi. hieu van nam thuc ((va hanh) or (va danh)) vi cua triet*.