Perhaps you should try some spelling variations:
estate investment » private investment
investment series » investment services, investment barriers, investment treaties
safer investment » safer investments, water investment, water investments
investment fund » investment funds, investment bank, investment flows
likert estate » likert scale

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. (kept OR dept) safer investment series ) or ( h. likert estate investment fund ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. (kept OR dept) safer investment series ) OR ( h. likert estate investment fund ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. (kept OR dept) safer investment series ) or ( h. likert estate investment fund ))*".