To avoid rambling and confusion, I am going to make this short and sweet while answering any questions in the comments.

Spent the last two-three months job searching. Felt like I have ran out of new jobs because when I try to search, the results either present the same job from a company who just reposted the application or it brings up jobs that aren't related.

I mainly use LinkedIn due to the other job seeking websites will provide the same jobs and I am not a fan of recruiting companies as they haven't been helpful towards my search. The type of job I want would be human factors (ergonomics) or biomechanical related. So I was wondering how to be more efficient in terms of finding these types of jobs within a company.