Support Threads

I would like to put three posts per line as you modify the grid so that you can post three posts per line my website is http://www.drlopezvalerio.com/category/blog/

Hello I have problems to make my site responsive on the iphone I could support thanks Site url is http://www.drlopezvalerio.com/ The site is not seen correctly there are more spaces I would like to be able to support how to solve it thanks