You cannot find filled Universal fluid Cells with the search function if you search for the liquid inside (glue).

That's because it's not inside the name. We only search for the name.
Now the question is, should we change that?

I think it would be cool if we could also search for stuff in the tooltip and not just the name.

Don't certain items implement an interface indicating they are fluid containers? If so why don't we search for the name of the contained fluid also?

I strip down the question: is there a way to switch between current and NEI search mechanism? How hard would it be to implement?