Perhaps you should try some spelling variations:
distribution political » distribution policy, distributions statistical
ele distribution » file distribution, hole distribution, mile distribution
teoria della » storia della
historia del » historia de
idee bis » idee des, idee die
bis ele » bis euler, bis ende, bis eben

Try widening your search to All Fields.

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• Removing quotes may allow a broader search: ((teoria della) or (historia del)) idee bis ele distribution political.