Perhaps you should try some spelling variations:
investment choices » investment costs, investment process
investment period » investment series, investment policy, investment demand
based investment » fixed investment, best investment, bond investment
heat sector » meat sector, health sector, heating sector
kept based » test based, report based

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. heat sector investment period ) OR ( h. kept based investment choices ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. heat sector investment period ) or ( h. kept based investment choices ))*.