Filtered deck: expressions in order to select notes which have been suspended but are not yet leeches

[BRUNEAU Didier]

Hello,

When studying a deck some cards which are too difficult are automatically suspended but can't be found as "leech". I would like, in a filtered deck, to use appropriate expressions which could select them in order to focus my study. 

I noticed in the browser, see the attached print screen, that in the column named " dû" , the due date for these cards is "0" instead of a date as "2021 04 06".

Do you know a way to do that?

Thanks in advance for your help.

Didier