I still can't Search multibytes language

I still can't Search multibytes language.

WinXP sp2, Drupal 4.6.1, Apache 2.0.53, MySQL 4.1.11, PHP 4.3.11
MySQL character set is utf8_general_ci.

My problem just like what yagami said: http://drupal.org/node/2142#comment-31328
And this is Chinese discuss: http://www.kzeng.info/node/832

I have read Steven's reply:

Search.module has an indexing preprocessing hook. For Chinese/Japanese searching, this is where you need to hook in a word splitter with an extra module.

Due to the way search works (by indexing words), Chinese / Japanese searching will never work out of the box.

But I still didn't know what should I do next!