Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
duoc va » nuoc va, duoc ma, duong va
van cu » van cau, van chu, van cua
cu tre » cu tren, cua tre, cuu tre

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 xa hoi. ((hieu ve) or (lieu va)) lam ((duoc va) or (duc va)) doanh van cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xa hoi. ((hieu ve) OR (lieu va)) lam ((duoc va) OR (duc va)) doanh van cu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xa hoi. ((hieu ve) or (lieu va)) lam ((duoc va) or (duc va)) doanh van cu tre*.