Add Ping action to search function

Hi WP experts,

I am building a dictionary type WP blog. I notice that other dictionary websites have google index their site search results (for example dictionary.cambridge.org/spellcheck/british/?q=us+congress)

Since there are thoudsands of search keywords, it is not possible to submit to google webmaster tools. I think they have way to integrate their site search result with pinging action. For example, each time an user type in a keyword to search within their website, the search url is automatically pingged.

Anyone has any idea how this can be achieved?

Thank you in advance!