Query nested objects in a document with unknown key

Working with Data
10

I am asking if we provide the text value for searching it will search and return the document . is there any way to find the key for ex below document :- is there any way to search o1n2rpon12prn value and return all the document which contains this value:- I am reading your last year previous post so thought I can ask here only. sorry for the statement, I am not a good writer.
{
“_id” : ObjectId(“60054d3e20b5c978eb93bb7f”),
“items” : {
“o1n2rpon12prn” : {
“LastEvent” : “On”
},
“sdbqw12f12f” : {
“LastEvent” : “Off”
},
“yxvcaqeg23g23g” : {
“LastEvent” : “Error”
}
}
}