Issue Summary

When searching for comments and applying the "Content under" filter in the advanced search, no results are returned. 

Steps to Reproduce

1. Perform an advanced search
2. Filter it to comments 
3. The results you are expecting are displayed
4. Further filter it to Content under and specify a page where the comments are added or a parent of the page.
5. No results are returned

Expected Results

Search results should be displayed based on the selected filters.

Actual Results

Search results should are not displayed accurately based on the selected filters.

Workaround

Filter on Type: Comments and enter part or all of the page title in the search box.