How can specify multiple words must be present in a word. For eg. Find all sentences that has words "cat", "dog" and "birds" in any order. <BR><BR>So this pattern should match following sentences<BR> All cats are neither dogs nor birds.<BR> All birds are neither dogs nor cats.<BR><BR>But should not match following sentences.<BR> All cats are not dogs.<BR> All birds are neither not cats.<BR><BR>Thanks<BR>_GJK<BR><BR>