Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
investments peru » investments pt, investments kenya, investments great
firm investment » farm investment, term investment, from investment
cost power » cost per, soft power
heat power » great power, best power, net power
melt firm » mart firm

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. ((cost power) or (heat power)) investments peru ) or ( h. melt firm investment treaties ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. ((cost power) OR (heat power)) investments peru ) OR ( h. melt firm investment treaties )).
• Adding a wildcard symbol may retrieve word variants: (( h. ((cost power) or (heat power)) investments peru ) or ( h. melt firm investment treaties ))*.