Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
investment period » investment series, investment policy, adjustment period
power investment » power investments, poor investment, border investment
melt better » eat better, help better, mold better
kept power » best power, heat power, net power

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