Perhaps you should try some spelling variations:
"2010 german federal election" » "2010 german general elections", "2012 german federal election", "2011 german federal election", "2014 german federal election"
"2015 berlin general election" » "2015 brain general election", "2015 berlin federal election", "2015 certain general election", "2015 beijing general election"

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: (("2015 berlin general election") OR ("2010 german federal election")).
• Removing quotes may allow a broader search: (( 2015 berlin general election ) or ( 2010 german federal election )).
• Adding a wildcard symbol may retrieve word variants: (("2015 berlin general election") or ("2010 german federal election"))*.