Perhaps you should try some spelling variations:
institution politischer » institutionen politischer, institutionen politische, institutions political
totale institution » totalen institution, soziale institution, whole institution
teoria della » storia della
tree 130 » tree 10, tree 1.39, tree 3
tree 13 » tree 3, tree 10, tree 1

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: teoria della ((tree 13) OR (tree 130)) totale institution politischer.
• Adding a wildcard symbol may retrieve word variants: teoria della ((tree 13) or (tree 130)) totale institution politischer*.