Perhaps you should try some spelling variations:
german » germans (Expand Search), gehrmann (Expand Search)
"Trading of East German political prisoners" » "Trading of East German politica prisoners" (Expand Search)
"Trading of East German politics prisoners" » "Trading of East German politisch prisoners" (Expand Search), "Trading of East German politik prisoners" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Trading of East German political prisoners") OR ("Trading of East German politics prisoners"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Trading of East German political prisoners\") OR (\"Trading of East German politics prisoners\"))*".
• Removing quotes may allow a broader search: (( Trading of East German political prisoners ) OR ( Trading of East German politics prisoners ))*.