ascertaining, descrying, detecting, determining, digging out, digging up, discovering, ferreting (out), finding, finding out, getting, hitting (on or upon), hunting (down or up), learning, locating, nosing out, rooting (out), routing (out), rummaging, running down, scaring up, scouting (up), tracking (down), turning up

espying, sighting, spottinglooking for, searching (for or out), seeking

missing, overlooking, passing over

losing, mislaying, misplacing, missetting(or mis-setting)