Explora TV Guide search doesn't allow you to search only certain channels or channel groups. Some search options used to have something like that but those are no longer available.
We have been begging for this but no changes (yet) - the only option is to search through ALL channels - and read (or write) a novel while waiting for the results.
Octo-LNB to 2 x 5.2 switches. Explora1 (Prim) & HDPVR 2P (Sec), Samsung 55" UA55F8500 Smart 3D LED TV, HDMI picture & audio via Onkyo TX-NR626
receiver. Explora2 in bedroom, HDMI picture & audio to Samsung 32" UA32F5500 Smart LED TV. 100Mbps M-Web fibre (OpenServe).