I see you're trying to filter users by skills and expertise, but are seeing a mix of results. If you're using spotlight search or the search bar to accomplish this, I would recommend instead to use the /people page and filter by skill. In this case, since I'm not sure which version of Jive you're on, I'm going to use the example of Jive Community.
When you navigate to https://community.jivesoftware.com/people you'll see the default people list. You may then click on "Add filter" and filter by skills or any other profile field you're looking to filter out. You may either enter in phrases on your own, or click on "browse more skills" to see the top 200 skills used by people in the Jive Community. Because you're filtering by skills, only users with these exact matches in their skills profile field should display.
I hope this helps. Let me know if you need anything else.
I didn't even think of that! Doh! Thank you