Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
nam thuc » nam thuoc, am thuc, nam tu
van dang » van dong, van dung, van nang
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
de cua » te cua, dieu cua
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tay lang xa hoi. hieu ve ((nam thuc) or (nam thu)) van dang ((de cua) OR (le cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay lang xa hoi. hieu ve ((nam thuc) OR (nam thu)) van dang ((de cua) OR (le cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tay lang xa hoi. hieu ve ((nam thuc) or (nam thu)) van dang ((de cua) OR (le cua)) tu".
• Adding a wildcard symbol may retrieve word variants: so sach tay lang xa hoi. hieu ve ((nam thuc) or (nam thu)) van dang ((de cua) OR (le cua)) tu*.