generating an email to the admin if the keywords can't be find?

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Hi,

Is there a way to generate an email to me (admin) if somebody searches with keywords but can't find anything.

Ie, not an email from the person, but the website would alert me because the person couldn't find anything with a word so that I can add pics which they are looking for in the future.

Hope this makes sense

Stock

[stock]

sorry if this is in the wrong thread, like my other email queries. Do move if so.

Stock