Perhaps you should try some spelling variations:
adjustment operations » investment operations, adjustment period
investment series » investment services, investment barriers, investment treaties
fixed investment » direct investment
rate adjustment » rate adjustments, trade adjustment, wage adjustment
rent rate » heat rate, current rate, percent rate

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. net fixed investment series ) OR ( h. rent rate adjustment operations ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. net fixed investment series ) or ( h. rent rate adjustment operations ))*.