Custom categories in search input

Hello,

For starters, I love your plugin, which works perfectly !
I just have one issue. I’ve created custom post types, with custom taxonomies. When I search the category “Agriculture” for exemple it works fine if I use the checkbox.
But if I type in the search input the word “Agriculture”, it doesn’t show any result.

Can you tell me what I can do to make it work?

Thanks a lot !