The Search skill is your capability of gaining information by spotting hidden things and deducing more from those things.
Dexterity
Dexterity Search allows a character to frisk and search for things using their hands, as such it can also be used to pick pockets.
Awareness
Awareness Search is the ability to look for things in an area, spotting hidden things and small careful details.
Intelligence
Intelligence Search is the ability to deduce more information, and investigate a scene.
Instinct
Instinct Search is the ability to look through a room, a crowd or a location and get a instinctual sense of how they are feeling and the atmosphere of the location.