Can't display _tagged series with Graphite


I have some tagged series in graphite (in graphite they are now stored under the _tagged field).
My serie’s name is something like com.*.engine.running.

However, if i look the available series names, i don’t see anything starting by com.

As you can see, i only see non-tagged series (carbon for instance).
And i see the _tagged serie, but names under this one are hashed so i can’t use it.

Anyone know how to create a querry for a graphite tagged serie and render it in my panel ?
(with variable templating if possible, as shown on my screen, there is a nb_cpu tag displayed as a grafana variable and i’d like to use them in my querry to easly switch between tag values)