Search engines stumped

[Harleyj]

What is the word or expression for an internet search that returns nothing ie a blank

[ChuckFickens]

googlewhack

[ChuckFickens]

Oh, actually, that's when it returns one answer only.

[Gizmonster]

A googlewhack returns 1 hit:
http://en.wikipedia.org/wiki/Googlewhack

[Graham-W]

A googlewack is two words, without inverted comas, which return only one result in Google.
Strangely, the word Googlewack, returns 19,000 results.

[methyl]

ungoogleable
http://www.urbandictionary.com/define.php?term=ungoogleable