Perhaps you should try some spelling variations:
investment demands » investment demand, investment funds, investment banks
investment rates » investment rate, investment banks, investment flows
fund investment » fixed investment, road investment, world investment
rent foreign » debt foreign, parents foreign, direct foreign
debt fund » debt funds

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. ((rent foreign) OR (net foreign)) investment rates ) OR ( h. debt fund investment demands ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. ((rent foreign) OR (net foreign)) investment rates ) or ( h. debt fund investment demands ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. ((rent foreign) OR (net foreign)) investment rates ) or ( h. debt fund investment demands ))*.