Celtic are set to be active in the January transfer window.
The Bhoys have been dumped out of the Europa League in the group stage, after they were beaten by Ajax on Thursday night.
And Deila realises that everybody at the club needs a lift, with Celtic aiming to bring a couple of new faces into the group at the turn of the year.
“Are we short? It’s not a case of being short, it is not about more players, it’s about getting in quality and that’s what we need now, maybe two players with real quality who can lift the team a lot,” he said.
“I have spoken about that [with the board]. Everyone has the same opinion.
“But we have to do it within our budget and that’s very important because we want to have a club who can be strong for many seasons. It is difficult, but it’s possible.
“The problem is always the transfer fees. So we have to stay strong and develop the players we have here.
"But we want to add players who can come into the club and make us ready for the Champions League next year and also it is important to win everything there is in Scotland.”
Celtic have already been linked with HNJ Rijeka defender Marko Leskovic by the Scotsman, with Deila’s attention now starting to turn towards January.
His task of convincing players to move to Parkhead is sure to be made more difficult by their failure to have a European run.
Celtic have now failed to qualify for the Champions League for two seasons running, and their group stage exit from the Europa League has placed further pressure on Deila.
Celtic’s next match comes against Inverness on Sunday, and Deila’s side will be eager to pick up the three points to give their supporters something to celebrate, after a disappointing week.