There are other versions of the song which mention 'pills of white mercury', which is what I was thinking of when I mentioned pills and potions ealier.
Could be 'tricks' that Norma sings - I certainly got the 't',the 'r'and the 's', and she does have to rush it slightly to get all the words in. And it does make more sense than 'trades'. Well done, Roberto, for finding it!