Hello,
I've encountered a trouble recently. We have a big category and subcategory tree ( at least 10 levels) with more or less 30 characters by label.
When searching for a subcategory in the deepest levels in the advance search, the result return no files despite the fact that those files are linked to this category.
Is there a sum limit for characters in the subcategories ? If it's the case, do you know how to increase this limit ?
Thank you sincerely for the informations ! 
Joffrey