I can kind of see why it would ignore words like "aurora", "space" or "and". But the search function ignores all of these:
Attack
Combat
Empire
Engine
Fast
Fighter (but not Craft or Gunboat)
Ground
Missile
NPR
Sensor
and more (such as, for example, multiples of the words, where they are applicable)!
That makes the search function unusable for half of the most common questions.