Perhaps you should try some spelling variations:
public retirement » public procurement, public sentiment, public advertisement
einem public » eine public, eines public, einem ausblick
base public » case public, basic public, caste public
safe public » state public, care public, large public
rural einem » rural line, rural elites

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( real ((base public) or (safe public)) sediment ) or ( rural einem public retirement ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( real ((base public) OR (safe public)) sediment ) OR ( rural einem public retirement )).
• Adding a wildcard symbol may retrieve word variants: (( real ((base public) or (safe public)) sediment ) or ( rural einem public retirement ))*.