You can use nested dataviews for that. Place a new dataview in the other dataview. You could use the association for the retrieval or use a datasource microflow to retrieve the object.
Regards,
Ronald
You can use xpath in stead of a microflow
[expiryDate < '[%CurrentDateTime%]- 5 * [%DayLength%]' ]
Edit1: Mind the spaces. (see documentation)
and use assocations to show data.