Hi,
I tried a few unique phrases I could quickly find in the documents:
– Phrase ‘xyzklmnp’ returns the test document: https://i.imgur.com/8l2PykU.png
– Phrase ‘pariatur’ returns the other test document: https://i.imgur.com/W0vqunW.png
– Phrase ‘accusamus’ returns another test document: https://i.imgur.com/k14H5GS.png
– Phrase ‘firefighters’ seems to work correctly as well: https://i.imgur.com/y6e9t06.png
If you wish to disable other results, such as posts and pages, then make sure to de-select the posts/pages option on the General Options -> Sources panel: https://i.imgur.com/4thzCXS.png
If a document is not returned, with any keywords, it is either secured or password protected. Those types of documents are not possible to parse, they are only printable and viewable.