Using SE38 or SE80 execute the report RS_ABAP_SOURCE_SCAN and fill the first field of the selection screen with the string that you want to find in a program.
Hint: don't need to use '*' at this first field
You can also play around with the plenty of fields that can help you find what you need. Try to use 'Z*' when filling program name field for example.
Use all fields in your favor.
