Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc 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
va tinh » may tinh
tinh ve » trinh ve, tinh ven, dinh ve
cua tre » cuu tre, cua triet, dua tren
ve dat » de dat, va dat, ve dao
cua te » cua tu
nuoc » quoc, duoc, ngoc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty lang xa hoi. hieu ve dat nuoc va tinh ve ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty lang xa hoi. hieu ve dat nuoc va tinh ve ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ty lang xa hoi. hieu ve dat nuoc va tinh ve ((cua tre) or (cua te))*.