company structures

You could also ask: how do I find the drops of water in an ocean?!, However, fun aside: You should explain for the moment, for what you look specifically:

administrative structures?
production structures?
Vertriebsstruktrukturen?
organisational structures?

etc.. etc.. pp. Then you would also have to explain sometimes closer, for which purpose or before which background you need something like that:

general consideration?
concrete consideration before a special background:
for a work on einembestimmten subject z.B. How one organises a dairy company!

without one can get for the moment ideas, what you want, actually, and for what you want this, if one can hardly help you, because the subject would be too general and would all-embracing!