If you’d like to distinguish between your subdomains, you can create an Advanced filter for your profile with the following settings:

Filter Type: Custom filter > Advanced
Field A: Hostname
Extract A: (.*)
Field B: Request URI
Extract B: (.*)
Output To: Request URI
Constructor: /$A1$B1

With this filter in place, the previous examples would appear with the subdomain attached:

www.example.com/index.html
help.example.com/more.html