Applying multiple parameters with AND operator to the same field is another issue.
Cannot do: ([LI_ProdFea][kf_Feature]=[searchtext1] and [LI_ProdFea][kf_Feature]=[searchtext2] and [LI_ProdFea][kf_Feature]=[searchtext3] )
No single record can meet that criteria.
Another reference to Allen Browne: http://allenbrowne.com/ser-50.html