Knowledge base search can be sorted?

Summary

Hi, just wanted to recheck if the knowledge management search can be sorted as per business unit or service categories for example,

1)Select one radio button as BU Italy and then only the Italy-related knowledge base will be searched by a user(end-user) as an agent or employee.

2)The next can be, to select one SR category as Legal, payroll from LOV, or radio button and then only that content will be applicable for searching.

3) or may be adding two layers of pages where the first layers select BU and then page second (as a layer) selects category and then page third is exact populating articles on the basis of Page 1+page 2 selection (combining 1+2).