Chris Wilder and his players are searching for the answer to the dilemma of turning strong displays into wins.
In the two league games in 2018, the Blades have dominated but only picked up draws against Derby County and Sheffield Wednesday. Before that, United won just once in December.
Ahead of Saturday's trip to Norwich City, the Blades chief commented: "We have to find an answer and a way to get back to winning ways.
"Apart from Millwall and Preston, the last nine or ten games have been good performances but we need to find a way to get us to the next level. In the last two games, we have had more than 60 per cent possession, more penalty box entries and passes than the opposition, but we need to find that last pass, cross, finish or bit of magic.
"From a set-piece point of view we have also put some good balls into the box. We're not just highlighting the wing-backs or the number ten, we have to have quality from all over the pitch.
"We get plaudits for the way we play. We dominate, but we all need to find an answer to turning these strong performances into wins.
"Do we believe we are good enough to kick on in the second part of the season? I think we are and the players need to go out and produce performances to prove that."