I'm trying to get posts with a certain keyword (in fact, a hashtag), but I'm not receiving all posts. For example, there are a lot of posts done by users on a certain page that are not being pulled although they're public. The call I do is similar to this one:
https://graph.facebook.com/search?type=post&q=keyword&access_token=XXXXX
Not sure if this type of posts are considered public but only retrievable by specifying the page:
https://graph.facebook.com/PAGE_ID/feed?access_token=XXXXX
But I need to retrieve all public posts containing a certain keyword and I don't know exactly which pages could users post to with this hashtag...