As you said, You could use the search engine but that can only get you one season at a time. Here's an example (the actual list is much longer):
Usually use this method to get packs only
Example
, to get all seasons of Lucifer, and you only want the packs, and the series consists of six seasons, I will search six different times
Lucifer S01
Lucifer S02
Lucifer S03
Lucifer S04
Lucifer S05
Lucifer S06
There is another way, but it will not be practical in all of the site, from search of TV packs blog. If you search for anything, you will find it in packs only
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For me, it is not very difficult, but your suggestion is good
If there is a possibility of this, it will certainly be done