There are so many way of url collection 1. write the google search box intitle:topic name+blog then collect the URL from the list. 2.write the google search box inurl:topic name+blog then collect the URL from the list. 3. URL can be collection by the software such as (The free blog commenter, Fast blog finder, Scrapbox, Zeno poster,more) 4. search the Google search box and write (url collection site)