Google's search count estimates are a bit weird here, but the main point is that there are plenty of "deterministic function" results with the word "SQL" in it.
> Even the second best result - google corrected the term to "deterministic algorithm"
It looks like you forgot to add quotes around "deterministic algorithm" in your search.
Is "nondeterministic function" a useful concept
Your observation is incorrect.
https://www.google.com/search?q=%22deterministic+function%22
About 451,000 results
https://www.google.com/search?q=%22deterministic+function%22+-sql
About 524,000 results
Google's search count estimates are a bit weird here, but the main point is that there are plenty of "deterministic function" results with the word "SQL" in it.
> Even the second best result - google corrected the term to "deterministic algorithm"
It looks like you forgot to add quotes around "deterministic algorithm" in your search.