Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
tay lang » tai lang, tay tang, tay quang
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
van cau » van dau, van hau, van chat
cau toc » cac toc, cao toc, cau hoc
dan cua » dan ca, ban cua, dai cua
y lang » o lang, _ lang, yen lang
toc va » hoc va, toc ta, tuc va
cua te » cua tu

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: "te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau toc va doanh dan cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) OR (tay lang)) xa hoi. hieu van cau toc va doanh dan cua te*.