Add Search History as a zsh til.

README.md

@@ -35,6 +35,10 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Rename Current File](vim/rename-current-file.md)
 - [Split Different](vim/split-different.md)
 
+### zsh
+
+- [Search History](zsh/search-history.md)
+
 ## About
 
 I shamelessly stole this idea from

zsh/search-history.md

@@ -0,0 +1,12 @@
+# Search History
+
+Often times there is a very specific command you have entered into your bash
+prompt that you need to run again. You don't want to have to type it again
+and stepping manually through your history may be suboptimal if you typed it
+quite a while ago. Fortunately, there is a simple history search feature
+that you can use in this kind of situation.
+
+Hit `Ctrl+r` and then start typing a moderately specific search term. Your
+search history will be filtered by that term. Subsequent hitting of
+`Ctrl+r` will step forward through that filtered history. Once you find the
+command you are looking for, hit enter to execute it.