Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
dinh lai » dinh lam, dinh lap, dinh hai
dinh tai » dinh toai, dinh tri, dinh thi
sang ma » tang ma, nang ma, sang tao
nam duc » nam duoc, pham duc, nam thuc
cua tre » cua te, cuu tre, cua triet
y sang » _ sang, duy sang
ma hoi » mai hoi, xa hoi, ma hoa

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 sang ma hoi. thien van nam duc va ((dinh lai) OR (dinh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) y sang ma hoi. thien van nam duc va ((dinh lai) OR (dinh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y sang ma hoi. thien van nam duc va ((dinh lai) OR (dinh tai)) cua tre*.