Perhaps you should try some spelling variations:
rates investment » notes investment, rules investment, water investment
investment rates » investment rate
based investment » fixed investment, bond investment, related investment
best investment » debt investment, net investment, forest investment
heat rates » heat rate, death rates, heat waves

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

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