Does Unicode search work?

• Drupal 6.2 search has been enabled, permissions given, and re-indexed.
• The search picks up certain strings (இன்றைய காலகட்டத்தில்) while not others (மேற்குறித்த கட்டுரைக்கு).
• Database is UTF-8 Unicode encoded, the web pages are displaying correctly.
• There seems to be several known issues, but no one has开发者_开发问答 posted a clear solution for this issue at the Drupal website. I tried to apply some of the suggested patches, and they failed.

Are the words getting indexed? IOW, are they showing up in the search_index table?