So, I've been trying to optimize our brand for our "brand name" + "review" keyword, I've been doing optimization for our site and other positive reviews for the past 3 months, and while I'm seeing significant improvements on the domain and page authority of some of the websites (my site is getting better rankings on other keywords), the top 10 of search results for "brand name" + "review" is still not changing. I'm trying to out rank the top 1 search result but no matter how hard I try and how many backlinks I build the search result doesn't get updated, no search result has changed its position. Can anyone explain me why? And can anyone help me to resolve this problem?