Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dao » lanh dao, thanh dat, thanh dam
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, vanh dai, thanh dat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
xuc va » tuc va, luc va, xac 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: tu sach ky lang xa hoi. hieu van cau ((xuc va) OR (duc va)) ((hanh dai) OR (hanh dao)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu van cau ((xuc va) OR (duc va)) ((hanh dai) or (hanh dao)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu van cau ((xuc va) OR (duc va)) ((hanh dai) or (hanh dao)) cua triet*.