Perhaps you should try some spelling variations:
investment demand » investor demand
investment period » investment series, investment policy, adjustment period
net investment » debt investment, direct investment, forest investment
kent private » net private, west private, kenyan private
kent net » kent e, kent cem, kent n

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. kent net investment demand ) OR ( h. kent private investment period ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent net investment demand ) or ( h. kent private investment period ))*.