A Snatch is an olympic lift i beleive. Not an easy one either, i dont think it does much for bodybuilding but if you need to know go into the powerlifting section they might be more of a help. My guess of the push press would be a standing front military press.
Don't quit it just cuz you can't lift it- Farma
"Wanna get big? stop lookin and start workin!"- Farma
"Quality not quanity applies to a lot of things; bodybuilding is one of those things" - Farma
Psalm 23 "Fear No evil!"
"The O.S.R has begun, we're taken out anyone in the way!!" - Farma
I could be mistake but, push presses is where you keep a bar out front with your elbows up, kinda hard to describe, but its the final stage in a power clean. From that point you squat down and then explod up as if jumping, and while you explode up you push the bar straight up. So basically its a standing front militray press with some squat action.
Big O's Teen Bodybuilding Site