MLS Question - Searching for a Backhouse

[Harrison Sharp]

Newish agent (9 months) - Is there a way to find properties on the MLS that have a back house or a second detached unit with them? Occasionally I will come across one when looking through properties but I'm trying to figure out if there is a way to automate this. Would setting up a keyword search in the property description section work? Any other creative ideas are appreciated. I'm in DFW if that matters.

Thanks!