i saw the fulltext stopword lists of mysql is in english. That\'s a bit weird considering mysql is used all over the world...
Anyway i lowered the ft_min_word_len to 3,
This should work:
To override the default stopword list, set the ft_stopword_file system variable. (See Section 5.1.4, “Server System Variables”.) The variable value should be the path name of the file containing the stopword list, or the empty string to disable stopword filtering. The server looks for the file in the data directory unless an absolute path name is given to specify a different directory. After changing the value of this variable or the contents of the stopword file, restart the server and rebuild your FULLTEXT indexes.
http://dev.mysql.com/doc/refman/5.5/en/fulltext-fine-tuning.html