Search function?

Why do I notice a difference in the search results between iOS on my iPad and the desktop version? If I search for a simple and prevalant topic such as ’food’ on the desktop version, I get every relevant lesson, course, and even variations of the key word. On iOS, the results are completely unrelated, rendering the search feature useless.

I‘m curious if anyone else has noticed this and if Anyone else wanted to share any tricks or tips of the trade to get the most out of the library.