Using two Vlookups to subtract, how to show "No Data" if Neither exist

I have a table divided by months with rows of data. I'm currently using this formula to subtract two different months from each other of a specific item.

=IF(ISNUMBER(MATCH(CONCATENATE($B6,$B$2,D$5),All_Data!$D:$D,0)),LOOKUP(CONCATENATE($B6,$B$2,D$5),All_Data!$D:$D,All_Data!$F:$F),0)-IF(ISNUMBER(MATCH(CONCATENATE($B6,$B$2,D$32),All_Data!$D:$D,0)),LOOKUP(CONCATENATE($B6,$B$2,D$32),All_Data!$D:$D,All_Data!$F:$F),0)

What I want to do is if neither of those find a number to have it say "No Data." I currently have it set to show 0 if the value doesn't exist in each lookup. The reason is because if one of the values still can be looked up, I need to still subtract it from 0.
I need a way to set it up if NEITHER value exist that it'll say "No Data"

Thank you.

Thank you for your reply. I mean it as "if both don't exist." I still want it to give me a 0 in the lookup if one exist and one doesn't so it will still subtract. But if neither exist then to say no data.

Thank you! That worked. I appreciate your help!