(Happy Valley, OR)  --  Police in Happy Valley are searching for two women who allegedly used stolen credit cards to make purchases.  Police say the women were caught on a surveillance camera trying to use the stolen cards.  Investigators say the cards were stolen over the summer in a series of thefts from cars parked at a Happy Valley park.  It's not yet clear whether the women were involved in those thefts.  Anyone with information is urged to contact police.