1)
Why does the verse say "Cherpasi", "u'Vashti", "u'Chilmasi"?
1.
Radak: This encompasses all kinds of shame.
2.
Malbim: "Cherpasi u'Vashti" refer to Ge'ulas ha'Nafshis, which is Ba'avurecha - "Ki Alecha Nasasi Cherpah" (verse 8).
2)
Why did he say "Negdecha"?
1.
Radak: Nothing is hidden from You.
3)
Why did he say "Kol Tzorerai"?
1.
Radak: You see them, and they are in front of You, and they think that You do not see.
2.
Malbim: You see how they afflict me with their plots.