Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » thanh va, thanh ve, nhanh vi
hieu van » hieu va, thien van, lieu va
cac loc » cac lop, cac toc, cac hoc
su sach » vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
van cac » van hac, van cau, van bac
loc va » hoc va, luc va

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 (so sach)) ky lang xa hoi. hieu van cac loc va ((thanh vi) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky lang xa hoi. hieu van cac loc va ((thanh vi) or (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky lang xa hoi. hieu van cac loc va ((thanh vi) or (hanh vi)) cua triet*.