Seems like those series aren't documented anywhere, they're searchable in the metrics explorer though.
level=info ts=2020-07-23T15:07:06.333Z caller=stackdriver_exporter.go:161 msg="Starting stackdriver_exporter" version="(version=0.10.0, branch=HEAD, revision=b52e21b38d2968eb1de34736a7c1c3c888c660b8)"
level=info ts=2020-07-23T15:07:06.333Z caller=stackdriver_exporter.go:162 msg="Build context" build_context="(go=go1.14.4, user=root@e0fc7c146b68, date=20200629-08:31:06)"
level=info ts=2020-07-23T15:07:06.333Z caller=stackdriver_exporter.go:163 msg="Using Google Cloud Project ID" projectID=
level=info ts=2020-07-23T15:07:06.333Z caller=stackdriver_exporter.go:184 msg="Listening on" address=:9255
level=error ts=2020-07-23T15:07:08.191Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/internal_lb_forwarding_rules_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:08.213Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/ip_aliases_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:08.213Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/internal_protocol_forwarding_rules_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:08.230Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/instances_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:09.200Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/subnet_ranges_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:09.202Z caller=monitoring_collector.go:252 msg="error retrieving Time Series metrics for descriptor" descriptor=compute.googleapis.com/psc_google_apis_forwarding_rules_per_vpc_network err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
level=error ts=2020-07-23T15:07:09.659Z caller=monitoring_collector.go:186 msg="Error while getting Google Stackdriver Monitoring metrics" err="googleapi: Error 400: The supplied filter does not specify a valid combination of metric and monitored resource descriptors. The query will not return any time series., badRequest"
Seems like those series aren't documented anywhere, they're searchable in the metrics explorer though.
Args: