Perhaps you should try some spelling variations:
investments series » investment series, investment services, investment ties
investment period » investment series, investment policy, investment demand
scale investments » scale investment, estate investments, social investments
bond investment » bond investments, road investment, fund investment
kent scale » likert scale

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 bond investment period ) OR ( h. kent scale investments series ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. kent bond investment period ) or ( h. kent scale investments series ))*.