Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tuc » cua duc, cua thuoc, luat tuc
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 tu » cua su, cua cu, cua vu
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 tu))) OR (cua tuc))~.
• 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 tu))) or (cua tuc))~".
• 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 tu))) or (cua tuc))*.