There are some 5/6 character searches with less than 10 results, but did not find empties
As an alternative to Ketza's https://www.google.com/search?q=jdjzwsz
Yeah, anything alphanumerical that short would at least turn up things like "word" lists.
Some short ones that are typically not accepted as input by the form, but these ones at least gives the results page.
https://www.google.com/search?q=%20
https://www.google.com/search?q=%0a
...
Short ones that you can type in:
https://www.google.com/search?q=a+-a
https://www.google.com/search?q=""
https://www.google.com/search?q=%27%27