E-Recruiting Candidate Search problem

Hello experts,

I'm trying to find a candidate in e-recruiting functionallity Canditate Search but I'm having problems with it. The candidate has name, first last name and second last name. When I search for name and first lastname, the hit list shows me, correctly, the candidate. When I search for the name, first name and second lastname of the candidate, I have no results in the hit list.

Can you please advice what's causing this and how to fix this? I need the search to considerate all of the names of the candidate (name, first lastname and second lastname).

Thanks