Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang van » hoang van, hang va
dinh lam » dinh van, tinh lao
hieu van » hieu va, thien van, lieu va
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
va dinh » van dinh, va kinh, va tinh
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren

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: toc sach y ((lang xa) OR (dang van)) hoi. hieu van lam duc va dinh lam ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((lang xa) or (dang van)) hoi. hieu van lam duc va dinh lam ((cuu tre) OR (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((lang xa) or (dang van)) hoi. hieu van lam duc va dinh lam ((cuu tre) OR (cua tre))*.