Hi there
In RoboHelp 8 you have the ability to display the Topic List
pod. In that pod you have an option of viewing which (if any) TOC
topics are a part of. You could click the heading to sort by TOC
and see which topics aren't part of any TOC.
If you just want to hide them from searching, you could
select them and display the properties. RoboHelp 8 has this way
cool new feature whereby you may indicate at topic level whether it
should be included in a search. This is done using Topic Properties
on the General tab (I think - RH8 isn't in front of me at the
moment)
Hopefully this helps... Rick