NEW YORK — After the Nets’ stars and offense were stifled by the Celtics’ game plan, Steve Nash teased some tweaks to unlock Kevin Durant but warned against expecting a schematic overhaul for Saturday’s Game 3. “There’s ways we can help. I think we keep those to ourselves,” the coach said. “Sometimes I think people when we talk about adjustments think of massive scheme shifts. A lot of times it’s like putting your feet two feet in the other direction. It’s not always, you know, some massive theoretical change.” Nash has fallen under scrutiny after back-to-back late-game meltdowns in Boston, wi…
