Why do scientific articles contain words, terms and theorems that can't be found with Google, the largest storage of knowledge there is?

For example, I was reading some articles through yesterday and found these words
>exceptional point (optics related; zero google results)
>downstream (when talking about electric current, zero google results)
>non-Hermitian systems don't obey conservation laws (zero google results)

Pajeets and shitskins just making words up these days?