Perhaps you should try some spelling variations:
doanh bat » danh bat, doanh tai, doanh va
doanh ban » doanh van, doanh nhan, doanh luan
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
van cac » van hac, van cau, van bac
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty lang xa hoi. hieu van cac tuc xa ((doanh ban) OR (doanh bat)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty lang xa hoi. hieu van cac tuc xa ((doanh ban) OR (doanh bat)) cua tre*.