Perhaps you should try some spelling variations:
student transfer » student transfers, student teacher
transform risk » transfer risk, transform crisis, transform test
transfer bei » transfer beim, transfers bei, transfer der
risk across » risks across
bei macro » bei marx, new macro, bei marc
luis a » luis f, luis c
bis » bias

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( bis ende _ transform risk across ) OR ( luis a student transfer bei macro ))~.
• Adding a wildcard symbol may retrieve word variants: (( bis ende _ transform risk across ) or ( luis a student transfer bei macro ))*.