Perhaps you should try some spelling variations:
dong phong » duong phong, dong phuong, dong thong
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
phong van » phung van, thong van, phong va
hoi hieu » hoi phieu, hoi tieu, moi hieu
cua dong » chua dong, cua cong, cua dang
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh doanh cua dong phong van ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - hanh doanh cua dong phong van ((toan tap) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh doanh cua dong phong van ((toan tap) OR (toan ban))*.