It was found that SOLR's stop words mechanism is preventing searches from returning results. For example, searching for "Death on the Job Report" yields no results, whereas searching for "Death Job Report" will return all objects that contain those words. SOLR admin produces all the expected results when running the search with the term "Death on the Job Report", so the root of the problem lies in eZ Find.

Steps to reproduce

I was not able to reproduce this on a local installation of eZ Publish, but it was verified that the problem exists not only on the customer's website, but also on share.ez.no.

To verify this, go to share.ez.no. Searching for "work report Etna" will return (as of now) 616 matches; searching for "work report on Etna" will return 3 results, and searching for "work report on the Etna" will return no results.