Advanced search operators
Over the next few days, we’ll be rolling out advanced search operators to the Google+ search box to assist you in refining your Google+ search queries. For example, I typed from:”Ina Gat” has:photo commenter:me into the search box and rediscovered this nice bokeh shot from Ina Gat.
You can search for posts that have particular attachments (like has:poll), posts where you were mentioned (like mention:me), posts before or after a date (like before:2016-04-01), posts in communities or collections, and more! You can even use operators like AND, NOT, and OR.
Read the complete set of rules at: https://support.google.com/plus/answer/1669519