Perhaps you should try some spelling variations:
foreign investments » foreign investment, foreign investors
investments period » investment period, investment periods, investment series
investment trends » investment funds, investment grants, investment treaty
scale investment » estate investment, trade investment, estate investments
dense foreign » dense forest, does foreign, dense forests
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. dense foreign investments period ) OR ( h. kent scale investment trends ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. dense foreign investments period ) or ( h. kent scale investment trends ))*.