For quickly finding the desired node in the Node Editor in the search box it is enough to type only the first letters from the node’s name.
This method works both in the shader node editor and in the Geometry Nodes search system.
For example, to search for the “Set Curve Radius” node, it is enough to type only the “SCR” letters in the search field. And to search for the “Principle BSDF” node, just type “PB”.