I've noticed a lot lately that when searching for a site that new algorithms on search engines are bringing up everything except the site. But I think bing has managed to get even worse that google. At least a search for flipboard actually returns the site at the top of the results. On bing, the actual flipboard site doesn't even make the first page of results.
A little FYI Microsoft, if you want to actually beat google you do need to actually give people the sites they are looking for when searching on bing.