Search categories

I do not found a proper description of how to set search categories in the UI.

I have different search categories with associated search keywords and want to configure such as:

Category: Maker Keyword: company
Category: Vehicletypes Keyword: vehicles
Category: Feature Sets Keyword: feature

My goal is to have each keywords attached to the search category and not all keywords as a full list. A simple list of comma separated category names as of maker, vehicletype, feature does not work.