Further filtering options on Ideas portal for end users

As a user of a company's software that had its own very good idea and help search capability, when it was purchased by another company which uses this idea portal for multiple products, it became (is) frustrating/not possible to try to drill down/search within a category or sub-category(ies). The "search all ideas" is only available at the main screen, so it will search all product software, not just the specific software for ideas. When looking at a category, if there are a lot of ideas in it, have look review them all (if want to take the time to do this). One good thing is when creating an idea, then other potential related ideas pop up to check if issue has already been addressed. This (the merged ideas, and potentially the related ones too - didn't look at each one) are coming on 5 years as a future consideration?

As an AHA user (my software vendor uses it for feature requests), I would like to add this. They switched from an in-house feature request system to AHA, and did a bulk import. There are perhaps thousands of ideas that need to be culled from the system because they have been implemented into the product by now.

As one of their customers, it's too difficult to search through the ideas portal to see if my idea has already been submitted for that product. It must be a massive headache for the company to wade through that mess, too.

From a portal management perspective, I don't want to just keep adding categories and sub-categories because the sprawl is endless - it detracts from user experience. I'd rather have different filters/groups of categories for users to drill down into. For example, if we have a category for service line, creating a secondary category for services within that service line would be incredibly helpful.