Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
fixed investment » direct investment
investment costs » investment funds, investment flows, investment banks
fund investment » road investment, world investment, road investments
debt fixed » net fixed
debt fund » debt funds

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. debt fund investment treaties ) or ( h. debt fixed investment costs ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. debt fund investment treaties ) OR ( h. debt fixed investment costs )).
• Adding a wildcard symbol may retrieve word variants: (( h. debt fund investment treaties ) or ( h. debt fixed investment costs ))*.