1)
Why does it say "Hashem Lo Ya'azvenu v'Yado"?
1.
Radak: When the Rasha slanders the Tzadik to the governor [so he will kill him], Hashem will not abandon him, to let the Rasha's intent be fulfilled.
2.
Malbim: He will not allow the Rasha to kill his body.
2)
Why does it say "Lo Yarshi'enu b'Hishafto"?
1.
Radak: The governor will not convict the Tzadik when he judges him (due to the Rasha's accusation).
2.
Malbim: Hashem will not condemn the Tzadik when He judges him; He will reveal his virtue to all's eyes 1 .
1
Malbim explained (verse 32) that the Rasha seeks make the Tzadik sin. Here Malbim connotes that he wanted to make people think that he is a sinner! (PF)