The recent Revit R2 update gave us the ability to quickly find
the content you need by way of a new search feature in the Type Selector or in
drop-down lists. It is also available when using the 'Reference other view'
feature for callouts, sections & details. To use it you can click the Type
Selector or a value field in the properties palette and enter keywords to
search.
Interestingly though, this feature is not available when
using the 'View Reference' tool. Another example of an unfinished tool? Fingers
crossed its due for completion in coming updates!