Perhaps you should try some spelling variations:
estate investments » estate investment, private investments, equity investments
investment series » investment services, investment barriers, investment treaties
investments flows » investment flows, investment flow, investments laws
trade investment » private investment, estate investment, trade adjustment
likert estate » likert scale
net trade » der trade

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. net trade investment series ) or ( h. likert estate investments flows ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. net trade investment series ) OR ( h. likert estate investments flows )).
• Adding a wildcard symbol may retrieve word variants: (( h. net trade investment series ) or ( h. likert estate investments flows ))*.