Perhaps you should try some spelling variations:
"germany ecological empire" » "germany geological empire", "germany psychological empire", "germany economic empire", "germany ecological exile", "germany ecological emptiness", "germany ecological ethics"
"germany colonies empire" » "germany cologne empire", "german companies empire", "germany colonial empires", "germany coloured empire", "germany colonialism empire"
"germany colonial empire" » "german colonial empire", "germany colombia empire", "german colonies empire", "germany 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: (("germany colonies empire") OR ((("germany colonial empire") OR ("germany ecological empire")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"germany colonies empire\") or (((\"germany colonial empire\") OR (\"germany ecological empire\"))))".
• Removing quotes may allow a broader search: (( germany colonies empire ) or ((( germany colonial empire ) OR ( germany ecological empire )))).
• Adding a wildcard symbol may retrieve word variants: (("germany colonies empire") or ((("germany colonial empire") OR ("germany ecological empire"))))*.