Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
investments period » investment period, investment periods, investments peru
firms investment » firm investment, firm investments, reforms investment
kept power » best power, net power
heat power » great power, best power, net power
melt firms » held firms, best firms, help firms

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

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