I often want my searches to be confined to long form content like blog articles or magazine articles, but google insists on including vaguely related shopping

I often want my searches to be confined to long form content like blog articles or magazine articles, but google insists on including vaguely related shopping sites, discussion forums or company product pages in the results. They had a prominent search in blogs option in the past, but it's now available only via some URL parameter hack. I'd really appreciate a search engine that confines itself to blogs.