Search for a known phrase or word?

Please excuse my ignorance. How do I search for a particular phrase or word? Can I search everything I have in Anki, or does it have to be a particular deck?
Thank you for your help!

What is searched?
By default, when you enter something into the deck browser search bar, Anki will search your whole collection for that phrase/query. All notes that match the query (e.g. contain a specific phrase) will be displayed.
You can get very specific with your searches too: See the chapter on searching in the official manual or play around with the different filters of the search bar.

No match highlighting
Anki currently does not feature highlighting of keywords within the matching notes (like ctrl+f in your internet browser would do).