You can spend a few bucks, and just get one of these.
or get one of these for less:
the clips under the trunk lid are NOT like those under the hood of the car, or in the wheel well.
Those are "fake" screws that spread a "anchor-type" clip. The ones under your trunk are just "button" clips...they are formed to spread on their own.
easiest thing to do, I found, to gain a better fulcrum pivot is to slide the V-shape under the button head, and then use the handly of another screwdriver under the clip removal tool's "pivot point" to gain a better fulcrum angle.