How can I add text next to the search icon in the header?

I’m currently searching for a way to add text next to the search icon in the header, as it would be much easier for others to understand what the magnifying glass means. Keep in mind that I want that text to be a part of the search button. If you have any suggestions please let me know!

@Juliukas you just need to replace existing code with the predictive search code.