LONDON - U.K. lawmakers subjected search giant Google to blistering criticism Thursday, accusing the U.S. Internet company of playing games with Britain's tax rules to avoid paying what it owed. In his second appearance before Parliament in roughly six months, Google Vice-President Matt Brittin tried to defend his company's complex corporate structure to a committee of skeptical U.K. politicians, many of whom seemed unconvinced by his assertion that Google was being transparent about how it paid its bills.