Session session = em.unwrap(Session.class);

        Criteria criteria = session.createCriteria(Client.class);
        criteria.setFirstResult(fromPosition);
        criteria.setMaxResults(countItems);

           if(nameMask!=null){
               System.out.println("name ="+nameMask);
               Criterion name = Restrictions.like("firstName", "%" + nameMask + "%").ignoreCase();
               criteria.add(name);
           }
        if(phoneMask!=null){
            System.out.println("phone ="+phoneMask);
            Criterion pMask = Restrictions.like("phone", "%" + phoneMask + "%").ignoreCase();
            criteria.add(pMask);
        }

        if(emailMask!=null){
            System.out.println("email ="+emailMask);
            Criterion eMask = Restrictions.like("email", "%" + emailMask + "%").ignoreCase();
            criteria.add(eMask);
        }


        List <Client> listRes = criteria.list();

name =ir
phone =760303
email =nat

select * where lower(this_.first_name) like ? and lower(this_.phone) like ? and lower(this_.email) like ? limit ?

Restrictions.ilike(String propertyName,Object value)

criteria.add(Restrictions.sqlRestriction("lower({alias}.email) like lower(?)", "%" + emailMask + "%",  StandardBasicTypes.STRING));

Restrictions.like("email", "%" + emailMask + "%").ignoreCase();