drum up
US /drʌm ʌp/
UK /drʌm ʌp/

1.
conseguir, atraer, promover
to try to get support or business
:
•
The charity is trying to drum up support for its new project.
La organización benéfica está tratando de conseguir apoyo para su nuevo proyecto.
•
He's going door-to-door to drum up business.
Está yendo de puerta en puerta para conseguir clientes.