Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
prices investment » prime investment, services investment, policies investment
investment fund » investment funds, investment flows
debt prices » debt price, debt crises, meat prices
a gold » a good, _ gold, a golden

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. a gold ((investment fund) OR (investment bank)) ) or ( h. debt prices investment treaties ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. a gold ((investment fund) OR (investment bank)) ) OR ( h. debt prices investment treaties )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. a gold ((investment fund) OR (investment bank)) ) or ( h. debt prices investment treaties ))".
• Adding a wildcard symbol may retrieve word variants: (( h. a gold ((investment fund) OR (investment bank)) ) or ( h. debt prices investment treaties ))*.