Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh tri » chinh tri
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
dinh ve » dinh ket, dinh van
cua tre » cua te, cuu tre, dua tren
ve cac » va cac, vien cac

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 ty lang xa hoi. hieu ve cac duc va ((dinh tri) OR (dinh ve)) ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty lang xa hoi. hieu ve cac duc va ((dinh tri) or (dinh ve)) ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. hieu ve cac duc va ((dinh tri) or (dinh ve)) ((cua tre) OR (cua triet))*.