I'm not sure what's causing this, but apparently the forum search function only gives 1 page of results when searching for card codes. As far as I know, typing in anything else gives you normal results. With multiple users facing the same problems, I know it's not just a problem I'm having alone. Here are a few screenshots I have as evidence of the problem:
This is problematic for users trying to search for deck ideas when posting a deck because if the Forum does not show them a full list of decks involving the main cards from their deck, then there is a higher risk of double-posting a deck posted months ago. The Google search function still works as normal, but as seen when the search function was completely disabled, many users do not think to use that option. As such, the sooner this is fixed, the better.