Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
cua thuoc » nha thuoc, cay thuoc, cua nuoc
va doanh » van doanh, vay doanh, va danh
hieu van » hieu va, thien van, lieu va
cua tuc » cua duc, cua tu, luat tuc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua te » cua tu
tuc va » thuc va, truc va, tuc xa

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: te sach ky lang xa hoi. hieu van cau tuc va doanh dan ((cua te) OR (((cua tuc) OR (cua thuoc))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu van cau tuc va doanh dan ((cua te) or (((cua tuc) OR (cua thuoc))))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van cau tuc va doanh dan ((cua te) or (((cua tuc) OR (cua thuoc))))*.