How to search for blogs

How to search for blogs
I saw on a website how you can do a certain search on google to find commentluv blogs and other dofollow blogs. Does anyone have any of these great searches that they use to find these blogs?
=============
Display Advertising|PPC

» Lyrics search engine?
» Search Engine Optimization at Internet Guerillas
» Get higher ranked in search engines
» Is really search engine optimization needed?
» Is there any solution for Search Engine/Online Reputation Ma