Where is the signal in your design hierarchy? You have a path filled in in "Look in" so it's only going to search at that level of your hierarchy. If you want to search there and below, turn on "Include subentities". Change "Look in" to your top-level design with "Include subentities" turned on to search the entire design. You should also turn on "Hierarchy view" because it makes it much easier to see where found nodes live in your design.
As for what you've found there, they are probably internal nodes created from your RTL. Scrolling around should show signals that you recognize. But adjusting "Look in" is probably your best bet.