You could try entering your keywords into the 'search by site or sponsor name' box at
http://www.whopaidme.com
That will show you which sponsors have sites that contain those keywords.
If the keywords are niches, try using the 'search by niche' box.
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WhoPaidMe - Cheque names, ePassporte IDs, Alexa data, combined review scores, new site launches & promos, for every sponsor and every niche!