It can be confusing and overwhelming at times. :)
As a first stop if you have not done this already, I suggest contacting Donauschwaben Villages Helping Hands community :
http://www.dvhh.org/You can contact them through their village or region coordinators emails listed on the website and ask for a look up and information about your ancestors on the mailing list.
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"Rodoslovlje" Serbian Genealogy Society
www.rodoslovlje.com