Are you saying that you get to the first network via remote access VPN (AnyConnect) and then are unable to reach a network that site is also connected to via site-site VPN?
If so, three things need to be in place:
1. The VPN pool needs to be included in the site-site VPN definition (on both ends of the site-site VPN),
2. A NAT statement for "outside,outside" needs to be in place, and
3. The remote site must know to route the VPN pool traffic via the device terminating the VPN.