Dear
Check user has proper authorizations for that tcode
check any layout is selected by user for which no data displayed
then do below steps
Report S_ALR_87012089.
Go to the report.give vendor account no
In further selections
Select General data,All vendors,Company code data,company code data,company code,purchasing organization,purchasing organization,check boxs,
Execute the report.
You will see the all the changes made in vendor master by date,time,vendor,changed by,field name,old value,new value.
If you need more fields, select the screen layout and select additional fields for your report.
Please let me know if you need more information.
Regards