The search function is sometimes better than google if I am e.g. looking up threads from me or another person or regarding a certain topic. In that regards the search fields of extended forum search are very useful.
As the used search terms are cached its quite comfortably to lookup stuff repeatedly, you can in this case re-use often used search terms. To put an example, posts from me to the topic powermizer. This leads me to the last threads regarding system optimization in conjunction with nVidia cards. This is only one example, there are others.
I agree, turning down to maybe 10s would be much relaxing if you mistype or use a not so good query.
If anything fails, I use google, but there you might get more results than wanted.