Perhaps you should try some spelling variations:
investment demand » investor demand
forest investment » foreign investment, direct investment, foreign investments
fixed investment » direct investment
investment does » investment data, investment assets, investment across
heat forest » meet forest, smart forest
test fixed » test field, net fixed, testing fixed

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. test fixed investment does ) or ( h. heat forest investment demand ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. test fixed investment does ) OR ( h. heat forest investment demand ))*.