Google+ allows you to search posts, people and spark inside Google+. Use the search box at the top of Google+ to search across Google+ and the Web. Results in Google+ search are delivered from:
- Google+ posts — Includes both public posts and posts that were shared with you
- People — Results from people suggestions
- Sparks — Trending content found elsewhere on the Web
[advt]As you type your search query, you’ll instantly see auto-complete suggestions. You can use your arrow keys to select from among the instantly returned suggestions, or you can complete your query and press Enter to see your full search stream. After searching, you may want to filter or save the search for easy access.
Since Google+ search can include posts that were shared with you and not with others, it’s likely that two people searching for the same query will see different results.
Posts in Google+ Search
Searching in Google+ often returns posts that have been shared with you or posts that have been shared publicly. Occasionally, these public posts, while interesting, may be from people you don’t know.
The content you share publicly in Google+ is publicly searchable — even if your Google profile isn’t. The content that you share to specific circles or people is only searchable by the people it was shared with. There’s no way to make the content you share not searchable. [source]