How can I stop from Magento from returning all products with non-sense search queries?

Currently, on my Magento store, a user can search anything in the 开发者_开发百科main search bar and it will return every product in the database. So if I sell nail polish, and the user types in "tom cruise" the user will get a list of every single product. I want to fix this so that if a user types in something that there isn't a match for the user get no results.

I'm running Magento 1.4.2.

Thanks for looking!

Go to the admin menu System > Index Management and rebuild all the indexes. Then do the same for System > Cache Management. Does the problem still exist?