Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
water investment » water investments, greater investment, better investment
rates investment » notes investment, related investment, greater investment
investment costs » investment funds, investment flows, investment banks
kenya rates » kenya water, denial rates
kent water » kenya water, melt water

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 water investment treaties ) OR ( h. kenya rates investment costs ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent water investment treaties ) or ( h. kenya rates investment costs ))*.