Hi!
Decklist search doesn't include second copy of core set by default, which leads to excluding a big chunk of search hits.
As Is
Default search settings: 
Search results with default settings (notice the number of search results): 
Expected Output
Search results when all packs are checked (notice that there are more search results than before): 
Continuation of search results when all packs are checked: 
Hi!
Decklist search doesn't include second copy of core set by default, which leads to excluding a big chunk of search hits.
As Is
Default search settings:
Search results with default settings (notice the number of search results):
Expected Output
Search results when all packs are checked (notice that there are more search results than before):
Continuation of search results when all packs are checked: