This is my first post so sorry if this has already been asked or discussed.
I downloaded Hearthfire and have that but no where can I seem to find Dragonborn or Dawnguard.
Can someone help? Have they discontinued these?

Xbox has been having major problems finding games/DLC through the search function. Many things I've searched for in the last week do not appear to exist, even though I know they do.
But the DLCs are still available.

Try going to "Skyrim" itself, and then clicking on the "Extras" button.

Hopefully Microsoft will have this fixed soon.