Perhaps you should try some spelling variations:
investment demand » investor demand
scale investment » estate investment, estate investments
trade investment » private investment, estate investment, trade adjustment
investment cost » investment costs
likert trade » likert scale, latent trade
red scale » red scare, grid scale, red salt

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. red scale investment cost ) or ( h. likert trade investment demand ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. red scale investment cost ) OR ( h. likert trade investment demand ))*.