Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
scale investment » estate investment, trade investment, estate investments
investment cost » investment costs, investment income, investment flows
import capital » imperfect capital, diaspora capital
kept scale » likert scale

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. kept scale investment cost ) OR ( h. import capital investment treaties ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kept scale investment cost ) or ( h. import capital investment treaties ))*.