drupal - Does Unicode search work? -

• Drupal 6.2 search is enabled, allowed, and.
• Search up some strings (®® ??) ?? ® X®®®®®®®_¾a®²Ã ?? One ?? A® ?? Â௠??? ®ÃƒÂƒÃƒÂ®®ÃƒÂ®ÃƒÂ ÃîࢠÃÃÃÃÃÃÃÃÃÃÃࢠ®ÃƒÂ ¢ Ã⠀ šÃ, ®) while not others ÃÆ'à A® ?? ¤ ?? ¤ ?? ÃÆ'à ¢ â,¬Å¡Ãƒâ € šÃ, · ÃÆ'à ¢ â,¬Å¡Ãƒâ € šÃ,Â? ¯ ??).
• The database is encoded UTF-8, Web pages are displaying correctly
• There are many known problems, but none posted a clear solution Drupal for this issue have not done it. I tried to apply some recommended patch, and they failed.

  What words are being indexed? IOW, are they looking in the search_index table?