Perhaps you should try some spelling variations:
doanh van » doanh va, doanh ban, doanh nhan
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
dang xay » dang van, van xay
doan van » doan va, hoang van, luan van
lang van » dang van, tang van, hoang van
duoc va » nuoc va, duc va, duoc ma
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 va ((doanh van) OR (doan 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 va ((doanh van) OR (doan 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 va ((doanh van) OR (doan van)) cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang xay) or (lang van)) hoi. hieu van nam duoc va ((doanh van) OR (doan van)) cua te*.