I do not know.

But they improved name search, actually. Previously you could only find exact profile names. So if you were to have a profile named bobbywojak and changed your display name to Bojak the Destroyer, you could not find bobbywojak with the display name.

Search is a bit literal and not very forgiving for typos and missing words. This was enhanded too, but is far from googles typo resilience. It is also a title search, not a description/content search. This is often not apparant for new users.

And the worst is searching for generic titles with clutter (words that are not part of the title, but were put in the title)