Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
quang ca » quang cao, quang cua, quang cu
y quang » ly quang, _ quang, x quang
hieu va » lieu va, hieu qua
danh vi » hanh vi, dinh vi, danh di
ca hoi » cau hoi, cua hoi, xa hoi
luc va » tuc va, loc va
vi cua » vai cua, di cua

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: ((te sach) OR (toc sach)) y quang ca hoi. hieu va cac ((luc va) OR (duc va)) danh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) y quang ca hoi. hieu va cac ((luc va) OR (duc va)) danh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y quang ca hoi. hieu va cac ((luc va) OR (duc va)) danh vi cua triet*.