To search for items whose text contains a *, use
Item Text matches wildcard *[*]*
Note that Item Text, not (Item), must be specified to perform an extended phrase search (since * is not a keyworded symbol).
http://www.kinook.com/UR/Manual/phrasesearch.htm
[*] will only match on text exactly equal to *
*[*] will only match on text ending with *
http://www.kinook.com/UR/Manual/matcheswildcard.htm