Nigel Pearson has admitted his side have lost their attacking sparkle.
City have scored just three goals in their last five games, and two of them have been netted by centre-back Michael Keane.
The other was scored by striker Jeff Schlupp, who went on as a substitute at half-time during Saturday's 2-1 defeat at Derby County.
City's top scorer is David Nugent with 14 goals this season, but he hasn't scored in the last eight games, while Chris Wood, who bagged nine goals in his first nine games since joining City in January, and has 20 in total for the season, has not found the back of the net in the last five games.
Pearson's other creative players, such as Ben Marshall, Harry Kane and Anthony Knockaert, are also off form.
"At the moment, we have a few players struggling to find form," said Pearson after City's defeat at Pride Park.
"We have probably got more flair players than we have had previously and, unfortunately, we have a few who are struggling to rediscover the sparkle they had at other stages of the season.
"That is something that we don't want to be the case.
"While we have created chances in many of the games, I don't think we have created many gilt-edges chances but created good situations.
"But we have lacked quality and haven't hit the target with the free-kicks we had around the box.
"The margins of errors are small, and they can be at times, but when we misfired like we did at Derby then it makes it an awful lot harder.
"It was an awful game, but for as bad as we played we could have got something out of the game."
Pearson admitted the performance of 20-year-old Schlupp, who produced a great finish in the second half to give City hope of salvaging a draw, was one of the few positives to come out of the game.
"Jeff looked very lively and I thought he did very well when he went on," said Pearson. "There is always a positive somewhere.
"Let's not build the lad up to much but he has played at left-back for us and done very well.
"He is versatile, as he showed at Derby, in playing on the left hand side of midfield and he scored a good goal.
"He has a lot of potential through the middle as well. I think he was one of our brighter sparks."
