Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh luan
te sach » toc sach
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
quan te » quan he, quan ve, quang tue
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac

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 ty hang ((ma hoi) or (xa hoi)). hieu ve cac xuc van ((doanh ban) OR (doanh nhan)) quan te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang ((ma hoi) OR (xa hoi)). hieu ve cac xuc van ((doanh ban) OR (doanh nhan)) quan te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang ((ma hoi) or (xa hoi)). hieu ve cac xuc van ((doanh ban) OR (doanh nhan)) quan te".
• Adding a wildcard symbol may retrieve word variants: te sach ty hang ((ma hoi) or (xa hoi)). hieu ve cac xuc van ((doanh ban) OR (doanh nhan)) quan te*.