If an item has an augment slot(s) the word 'slotted' appears before the description.
If an item has a third bonus the word 'rare' appears before the description.
So +15 wisdom goggles of +3 insightful evocation dc with +7 insightful wisdom and a green and clear slot would appear as:
"Rare slotted prudent 15 goggles of evocation 3"
Then you can at least filter by the word rare and just see items with a third power, etc.
Alternatively instead of rare just add "and insightful wisdom 7" at the end (but do the same thing with the slots).
Then we can search for the word 'and' to get items with a third power.