Perhaps you should try some spelling variations:
investment services » government services, treatment services, investment choices
investment period » investment series, investment policy, investment demand
safer investment » safer investments, water investment, water investments
trade investment » private investment, estate investment, trade adjustment
likert trade » likert scale, latent trade
kept » dept

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. (kent OR kept) safer investment period ) OR ( h. likert trade investment services ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( h. (kent OR kept) safer investment period ) or ( h. likert trade investment services ))~".
• Adding a wildcard symbol may retrieve word variants: (( h. (kent OR kept) safer investment period ) or ( h. likert trade investment services ))*.