Same SEO Problem Came To Me Again

In fact, years of learning search engine optimization doesn't guarantee me can walk easily in the field of SERP. The last problem I have is just now, when I try to post my experience in the last SEO contest, although I have written a very long article with onpage maximized, but never shown up in the search results. It's a pity, right? And what make me upset and can't think clearly is that I post