Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
trade investment » private investment, estate investment, trade adjustment
investment ties » investment series, investment trends, investment trust
kent foreign » net foreign, debt foreign, den foreign
kent trade » net trade, best trade, nest trade

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 foreign investment treaties ) OR ( h. kent trade investment ties ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent foreign investment treaties ) or ( h. kent trade investment ties ))*.