Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
doanh van » doan van, doanh va, doanh ban
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ty » sach y, sach tu, sach thu
toc vay » toc tay, toc va, toc giay
cac toc » cac toi, cac nuoc, cac thoi
van cac » van hac, van cau, van bac
dang xa » dang xay, lang xa, dang ha
ty dang » ty xang, ky dang, ty hang
cua tu » cua tuc, cua cu, cua vu
cua su » qua su

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 ty dang xa hoi. hieu van cac toc vay doanh van ((cua te) OR (((cua tu) OR (cua su))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty dang xa hoi. hieu van cac toc vay doanh van ((cua te) or (((cua tu) OR (cua su))))~".
• Adding a wildcard symbol may retrieve word variants: te sach ty dang xa hoi. hieu van cac toc vay doanh van ((cua te) or (((cua tu) OR (cua su))))*.