Perhaps you should try some spelling variations:
investment projects » development projects
investment period » investment series, investment policy, investment demand
fixed investment » direct investment
rates investment » notes investment, water investment, related investment
kent fixed » net fixed
kent rates » heat rates

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. kent fixed investment projects ) or ( h. kent rates investment period ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. kent fixed investment projects ) OR ( h. kent rates investment period )).
• Adding a wildcard symbol may retrieve word variants: (( h. kent fixed investment projects ) or ( h. kent rates investment period ))*.