Sorry, do you mean you want a spot-on product that covers fleas AND worms combined (which would be the veterinary prescribed Advocate & Stronghold as mentioned above) or a flea product and a worming product that you can give together? You would be better off using a multiwormer such as Drontal or Milbemax over the Bob Martin stuff - it will be one or two tablets required as a single dose and is recommended to repeat every 3 months.
I've just remembered there is a product called Program Plus (available from your vet) that covers fleas and worms. It comes in tablet form and has to be administered monthly