Google now has a documentation page dedicated to Maps URLs:
https://developers.google.com/maps/documentation/urls/guide
An API key is not required.
Manipulating one of the examples, I came up with this URL scheme that fits your question:
https://www.google.com/maps/search/<search term>/@<coordinates>,<zoom level>z
A valid example of this would be:
https://www.google.com/maps/search/pizza/@41.089988,-81.542901,12z
This should show you all of the pizza places around Akron, Ohio.