Load more and filter (not necessarily in this order)

The problem exposing might seems trivial to you. It still isn't clear for me which solution to choose.

Saying that you have a input text where you can type anything. Beneath it a list of ten element and a load more button. Once the user clicks on "load more", ten more elements are added to the list.

My question is, when typing a text to filter, if there is 100 potentials results in the database, should we show the 10 first and a load more button or 20 ? since the user already clicked once on load more, we could expect him to want it to stay as is.

Thanks,