Copy of https://www.reddit.com/wiki/search?v=bb181eaa-0883-11e5-8266-0e4f7a178b4b
reddit search allows you to search for submissions and subreddits.
The search page for submissions is at http://www.reddit.com/search. You can also search from the sidebar of most reddit pages.
Searching from a specific section of reddit — such as a subreddit, personal multireddit, or temporary multireddit — can limit your search results to that section.