Right now this is my biggest issue with Drupal. The search engine is completely unusable. It's simply not possible to search for more complex strings like more than one word enclosed with " " or get useful results searching more than one word.
The functionalities aren't the biggest problem, though. The search function on my site just doesn't work. Some nodes aren't getting indexed for some reason. The search page shows that: 100% of the site has been indexed. But this doesn't reflects the reality.
Try follow this: http://www.cesspit.net/drupal/search/node/pann
Then look at this: http://www.cesspit.net/drupal/node/747
As you can see that node isn't "seen" by the search system for unknown reasons. This happens frequently for a bunch of nodes both new and old.
It would be nice if someone could start working on a decent search system that is actually usable. Being able to search using dates would also be appreciated.
-HRose / Abalieno