Search items and descendants

[seanferns]

I need to be able to perform a search within a few items and their descendants.
So I have something like this:

Search1 [ itemid is 123 or itemid is 456 or itemid is 789 ]
Search2 [ itemid is 123 or itemid is 456 or itemid is 789 or is descendant of Search1 ]

This works but is there a better way of doing this ? Perhaps without duplicating the itemId list ?