Kill 5 enemies while they are searching for Lara.
This trophy is missable. During an enemy encounter, run out into the open to be detected by the enemy. Then wait somewhere behind a wall or in the bushes until they stop shooting - this means they have lost sight of you.
When they start searching, let them come to you. The best way to do this is to hide in some foliage, then when they're close, perform a stealth takedown.
Repeat the process until the trophy pops. You can even farm this via checkpoint restarts if you need to. But make sure to keep at least one enemy alive, otherwise the game autosaves.