You can access support documentation at Support Page. We also offer live support using Skype to the customer of nopAccelerate plus pro/search extension. Moreover, we also offer free support for installation and configuration for plugin, customizing theme, installing Solr, etc.
If you are facing technical issue, please check common issues here. If you are facing an issue not listed there you can request a priority support here or open a ticket by emailing to our support email address.