Perhaps you should try some spelling variations:
doanh bat » danh bat, doanh tai, doanh va
doanh ban » doanh van, doanh nhan, doanh luan
lang van » dang van, tang van, hoang van
te sach » toc sach
lam duc » lam duoc, pham duc, nam duoc
duc van » duc va, duc tan, duc manh
van lam » van nam
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet

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 ky ((lang xa) OR (lang van)) hoi. thi van lam duc van ((doanh ban) OR (doanh bat)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) or (lang van)) hoi. thi van lam duc van ((doanh ban) OR (doanh bat)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (lang van)) hoi. thi van lam duc van ((doanh ban) OR (doanh bat)) cua tre*.