Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
nam thuoc » nam thuc, nam thu, nha thuoc
hieu van » hieu va, thien van, lieu va
nam duoc » da duoc, dat duoc, nam moc
dang xay » dang van, van xay
va doanh » van doanh, vay doanh, va danh
lang van » dang van, tang van, hoang van
van cua » vang cua, ban cua, dan cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((dang xay) or (lang van)) hoi. hieu van ((nam duoc) OR (nam thuoc)) va doanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang xay) OR (lang van)) hoi. hieu van ((nam duoc) OR (nam thuoc)) va doanh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((dang xay) or (lang van)) hoi. hieu van ((nam duoc) OR (nam thuoc)) va doanh van cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xay) or (lang van)) hoi. hieu van ((nam duoc) OR (nam thuoc)) va doanh van cua te*.