We should have the ability to save and share searches in staff interface
I did not know the search history page : catalogue/search-history.pl
I am not sure if the search history is really great for this. In our installations we only keep it for a little while, treating it as temporary. You can't exactly share them and you can't label or describe them to remember what the search was about. But maybe the search filter functionality is what you are looking for? /cgi-bin/koha/admin/search_filters.pl
I don't know the search filter feature, we don't use it in my library. I will take a look...