Feature Request - Search by multiple tags

[unyacat]

This app is so great!
But this app does not seem to support searching by multiple tags. I think it would be more convenient to support it.

[gregordr]

To clarify: If we have the following pictures:

A: pictures of a cat
B: picture of a dog
C: picture of a dog and a cat

should the query dog cat return only C, or all of the above?

[unyacat]

Intuitively, I would expect C to be returned.