Two connected pawns with knights win, but only with care: the pawns must stay protected while the king leads, and the first move is a knight repositioning rather than a pawn push.
Knight and two connected pawns against a knight is normally a win, yet it is one of the easier endings to spoil. The pawns on d4 and e3 are a target for the black king on d5 and knight on c1. White must get the pieces coordinated before advancing.