Honestly ArtStation needs to optimize their filtering tools on so many levels it’s not even funny. Oh, you want to search? Do you want it by how recent it is, or how many likes it has? Hope you don’t want to further filter by category or medium.
Additional search features would always be welcome for whatever content you're seeking. You're always welcome to make suggestions to the Artstation support email as that's primarily what it's there for. Just remember to be clear & respectful in your recommendations. 