This page of The Last of Us game guide contains information on where to find the training manuals and tools in The University chapter. Those items are collectibles-secrets. Our walkthrough indicates the exact location of each artifact and pendant.
Health Sterilization 2
Description: Increases your first-aid skills in the battlefield.
Once you reach a big square with a fountain in the middle, turn right.
There is a building there which you can walk into through the smashed window.
Climb the stairs to reach the upper floor and walk over the roof to get to the next room.
The manual is on the desk at the window.
Description:: Increased range of the incendiary bomb.
Once you enter the science building through the hole in the wall, find the door with the red and yellow cables underneath.
Do not open the door and go to the left end of the corridor instead. Open the door with your knife. Inside, at the other side of the room, you will find the book.
The tools are right to the most recent manual.