If you actually knew how to use Google this wouldn't be a problem. The `site:` filter is your friend.
chrome://settings/searchEngines
search engine: rapgenius.com
keyword: rg
url: http://rapgenius.com/search?q=%s
Then just type rg<tab> in the omnibox and search for whatever you want, and get taken to rg's serp.
rapgenius.com<tab>search terms
autocomplete is supported so you can also just do ra<tab>search terms
if rapgenius.com is your first autocomplete result for "ra"And there's still no damned excuse for them not being able to search maps.google.com from the omnibox.