The engine does not ignore triggers name.
It's exactly the same as naming an unit of some sort.
If you name a trigger you can also deleteVehicle it if you wish...
The text part is just for the editor to keep track of which trigger does what...
BUT in this particular case you do not need the triggers to be named (actually it's quite rare to need them to be named).
What you need to do is to have the three triggers to be activated by something and have in the 'on Activation' field
obj1 = true and so on, then use the end trigger as described in the above posts by having in it's 'condition' field the
obj1 && obj2 && obj3...
No guarantees as usual...