I have a book in German on all the German Russian villages that were in Russia. I checked my book your spelling for many of the places you are looking for is off some.
The river you mentioned is the River Molotschna.
I have to ask is it possible who you are looking for in these villages could some have been Mennonite at one time??? I ask this as some of the villages you are looking for were Mennonite??? I am wondering if some could have been Lutheran at one time also??? If you email me directly I can give you info on the villages. email@example.com
What surnames are you researching???