Could you also add examples of things which *might* look like they would generate a result from this, but shouldn't and don't? A couple simple examples might be "movie princess characters" and things which hit your internal guards.

When testing for "no result" you  still put the queries inside the `ddg_goodie_test` function, replacing the `test_zci(...)` portion with `undef`:

```perl
'query with none of the right words' => undef,
```