Also appear in the same block where [[water]] appears.
The following regex search string will search for things from the same sentence (not blocks, but I hope it might still be helpful). By the same sentence, I mean continuously typing without pressing the ‘Return’ key.
I created a sample page.

I did the following search.
/ (?=.*?\[\[water)(?=.*?acidic)
And there was a hit !

If I split the sentence such that [[water]] and [[acidic]] are not part of the same sentence (paragraph/block), you don’t get any results (which is what we are looking for)


You can also add more terms to the search or do boolean operation in this. Let me know what you think @verma