Bing is a search engine website, just like Google. When it comes to search results, it differs a lot from Google's. Their search engine results are poor, and I'm pretty sure that there are hundreds of loopholes to their system since they don't really focus or work on their search engine algorithm as much as Google. If you do want to rank on Bing, I would recommend you rank on Google first. If you do appear in the Google SERP's, you'll mostly appear on Bing's as well.