I am sorry you are having so much trouble with Spotlight. To force Spotlight to re index
Go to System Preferences/Spotlight and go to the Privacy panel
Drag your Hard Disk into the Box that says Prevent Spotlight from Searching these Locations. Wait a few seconds and then click on the Hard Drive in the box and hit the minus down below. It takes 8 minutes on my computer to re index. I only have about 28 GB. You can use Cocktail or Onyx to also force a re indexing. I can not help you with the help menu and there may be a link. On my machine I can find through text, (thought not in Quicken or FileMaker), title or in the find by type of file etc. I hope the re indexing helps or one of the Pros can find a deeper solution.
How is your Mini indexed once a week?