ResolutionList of additionally suggested domains in Online Store may be configured in /var/opt/hspc-frontend/includes/settings.ini configuration file with LOOKUP_EXTRA_TLDS parameter:
; Possible values: ALL|NONE|LIST, LIST by default
; ALL - lookup domain in all available tlds
; NONE - lookup in selected tld only
; LIST - lookup in selected tld and in additional tlds list, LIST = "com net org" by default
The list of suggested domains in each TLD may be configured in /var/opt/hspc-frontend/includes/domains_suggestions.ini file, SUGGESTIONS_SUFFIX parameter. By default it is set to 'site, page, shop, web, online, service'. You may either reduce number of suggested domains or completely disable it - set SUGGESTIONS_ENABLED to "off".