Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
van doanh » toan doanh, van dong, van thanh
dang xay » dang van
hieu van » hieu va, thien van, lieu va
cac toc » cac toi, cac nuoc, cac thoi
lang xa » lang ha, lang van
dan cua » dan ca, ban cua, dai cua
toc van » hoc van, toc san, tac van
van cac » van hac, van cau, van bac
te lai » te tai, te bai
lai ky » sai ky, dai ky
cua tu » cua tuc, cua su, cua cu

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