search term with semicolon

[Mr. Bessem Aamira]

Hello,
Does anyone have an explanation why the search with a term containing a 
semicolon only returns a result for the first part (before the semicolon) 
Exemple
 
http://invenio-demo.cern.ch/search?ln=fr&sc=1&p=text1;text2&f=&action_search=Recherche&c=Articles+%26+Preprints&c=Books+%26+Reports&c=Multimedia+%26+Arts