Perhaps you should try some spelling variations:
power investment » power investments, poor investment, border investment
investment ties » investment does, investment series, investment trends
grew investment » green investment, free investment, growth investment
kenya grew » kenya growth
net power » new power, non power, act power

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: (( h. net power investment ties ) OR ( h. kenya grew investment barriers ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. net power investment ties ) or ( h. kenya grew investment barriers ))*.