Perhaps you should try some spelling variations:
investment strategy » investment rate, investment rates, development strategy
investment demand » investor demand
scale investment » estate investment, trade investment, estate investments
debt investment » direct investment, direct investments, forest investment
kent scale » event scale, debt scale, likert scale
kent debt » net debt, debt debt, kent deng

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 debt investment demand ) OR ( h. kent scale investment strategy ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent debt investment demand ) or ( h. kent scale investment strategy ))*.