Perhaps you should try some spelling variations:
"germany colonies empires" » "germany cologne empires", "german companies empires", "germany countries empires", "germany colonies genoises", "germany colonies exposed"
"german colonial empire" » "german colonialism empire", "american colonial empire"
"german colonial empires" » "german colonialism empires", "american colonial empires"

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: (("german colonial empire") OR ((("german colonial empires") OR ("germany colonies empires"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"german colonial empire\") or (((\"german colonial empires\") OR (\"germany colonies empires\"))))*".
• Removing quotes may allow a broader search: (( german colonial empire ) or ((( german colonial empires ) OR ( germany colonies empires ))))*.