Alter Aeon Online Help

Keywords are:  'thief skill searching'

Skill: searching                Lvl  4 Thie  (28%)
                                (critical)   
                                Group: Thief stealth skills

This skill is used to find hidden or non-obvious things.  In the course of
searching, you may uncover hidden exits, concealed doors, hidden objects,
or even hiding thieves.

Thieves with knowledge of the hide skill will have a better chance of
finding things when searching.

While it may take several attempts to find something that is well hidden,
those well versed in the skill are more likely to notice clues that there
is something hidden even if they don't discover it outright.  The search
skill will allow you find larger pieces of wood when gathering firewood
and gives a small bonus to success when gathering and prospecting for
various resources.

For those that have knowledge of trapping explicitly searching doors,
exits or objects may also reveal traps.