It would be useful, if one could search by keywords not longer than one or two characters of CJK scripts. It should not be activated for Latin scripts. But in Chinese or Japanese the majority of words only have one or two characters. With the requirement to enter at least three characters it is simply impossible to search for most files with a Chinese or Japanese title unless they have an uncommon title with very long and rare words. So, for example, if you're searching for literature by 嚴復 (Yan Fu) you're completely lost in aMule. You can only hope the author you search for has three syllables in his name.