How to cut an awkward small piece of Tile without breaking the Larger piece of tile

Hi

I am looking for advice as to how to cut an awkward small piece of Tile without breaking the Larger piece of tile.

The tiles are already laid & the pieces I am trying to cut are on both sides of where the door closes.

I have managed to cut the more accessible areas fairly cleanly under the circumstances(i'm not a pro).

See photos attached

Thank you