Although Jose Mourinho appeared fairly comfortable with drawing 0-0 against Norwich, a result that reduces Chelsea's already-small chances at the title to essentially zero, the Mail is reporting that he was rather unhappy at halftime, 'blasting' the players for their frankly terrible performance in the first 45 minutes.
The victims (that we know of) were Nemanja Matic and Mohamed Salah, the latter of whom was apparently told to come back in pre-season 'ready to become a footballer'. I'm a little surprised Matic got a blasting* -- Mourinho reportedly said that he was regretting sanctioning his January signing -- because he was one of the few players actually doing anything in the first half, but it's entirely possible that he wasn't living up to the manager's high expectations.
*And not particularly pleased, since substituting him for Fernando Torres later on was, for me, a remarkably silly idea.
Is this a big deal/'amazing half-time bust-up'? Probably not. Chelsea were bad enough in the first half that there was a double change at the break, and when a team looks that poor it's hardly common for a manager to have a go at them. It's also kind of strange that the Mail have decided to weave this story into the Ashley Cole tears narrative, but c'est la vie, I suppose.
Also I'm pretty sure you can't have a bust up if it's just one person shouting the whole time.