Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
van doanh » toan doanh, van dong, van thanh
lang van » dang van, hoang van, giang van
tang van » dang van, hoang van, trong van
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
dan cua » dan ca, ban cua, dai cua
duc van » duc va, duc tan, duc manh
lam duc » lam duoc, pham duc, nam duoc
van lam » van nam
sach ky » sac ky, sach y, sach ty
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.

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