What exactly do you want to achieve with the search?
Something like - all services with name “X” and all performance values starting with “load” ?
If you mean such a procedure than i only can say not possible at the moment.
With the combined graph feature only the possibility to filter for specific performance values is missing.
All CPU load from a search combined in a graph is working but not only the load5 or load15
check_mk/combined_graphs.py?datasource=services&filled_in=filter&presentation=lines&service_regex=CPU+load&view_name=searchsvc&view_title=CPUload