[dschobel]

Fantastic work! Just curious, why does it not return any results for long strings?

For example, putting "hacker" in the Beginning box and "ne" in the Ending box yields no results.

[jcrocholl]

Because it's a search engine for short names, using a large database of unused and expired domain names. Try searching for "hack" + "ne", or "hack" + "e" for even more results.