intellij idea find by regex

i need to search for initialization of classes by name, the project is big, and i want to use regex to find the instances inside the intellij idea . Here is a list of classes name:

1. BdService

2. BdClusterService

3. BdServiceClient

4. BdClusterServiceClient

5. BdServicesManager

6. BdServiceClientsManager

I need an advice and regexs also, but maybe you know the proper way to find the initialization of this classes?