Why are some Parts not being selected?

[Lethanity (Leth)]

Here in this screen shot I have selected my whole home store, as you can see a few parts have not been able to be selected even though I have done the drag select on everything.

If somone could tell me whats wrong or give me an idea of what to do that would be very nice.

[Khronikus]

Those parts are either part of a group that’s much bigger, or the parts themselves have been locked.