Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
doi hieu » doi chieu, doc hieu, doi hien
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - hanh doanh cua thong ((cong thanh) OR (dong thanh)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh doanh cua thong ((cong thanh) OR (dong thanh)) toan tap*.