It should work fine with quotes (for example search for "ubuntu 18.04", including quotes) as long as there are no typos.
If people typed that out fully when they ask yes, but on an Ubuntu forum that would be extremely redundant and "18.04" triggers on everything to do with 18th of April and other junk. The nice part about the nicknames is that if I say zesty and the page contains ubuntu somewhere, you've probably come to the right place even if they're not right next to each other. They should try to keep them short and simple tho. Like:
artsy, burly, curly, dandy, earthy, frisky, gaunt, humble, innate, jolly, keen, livid, murky, narly, overt, puffy, queezy, rocky, sweet, tasty, unique, vaunty, wobbly, x... can't really think of any. But I think that's enough for another decade.