[gnfargbl]

You would be better off asking this question to a recruitment consultant, ideally one that specialises in whatever it is that you would label your core skillset.

Without seeing your CV, my guess would be that you're missing some criteria that the orgs you're applying to are applying as a front-end filter. For example, maybe you don't have the right degree (or maybe you don't have a degree at all), and the places you've applied to auto-bin CVs which don't meet this standard. This is something a recruiter can likely help with, either by manually bypassing the filter or by pointing you towards orgs which don't have those requirements.

The other thing I would say is that it's pretty clear you actually want a raise, not a move. Is that coming across in your applications? I wouldn't personally waste time interviewing someone who didn't seem like they were genuinely looking for a job change.