Let me explain, son.Look son, apart from their supernatural inability to use twitter, no-one here has 'explained' anything to me.
He's being tagged twice a second just now and isn't trending...so you can gtf. But you're right...nothing more to say about it here.
You can refine your search on twitter so it only searches certain things - you've selected to search 'people', so your search isn't for posts tagged #dominiccummings - it's for someone with the username @#dominiccummings, and there isn't anyone on twitter with that username so you're getting zero results. If you click on 'latest', it'll show you all the posts tagged #dominiccummings
Hope that helps. x