Perhaps you should try some spelling variations:
investment strategy » investment rate, investment rates, development strategy
forest investment » foreign investment, direct investment, foreign investments
trade adjustment » price adjustment, price adjustments
adjustment costs » investment costs
west trade » wheat trade, leste trade, net trade
dense » sense

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 forest investment strategy ) OR ( h. west trade adjustment costs ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. dense forest investment strategy ) or ( h. west trade adjustment costs ))*.