Perhaps you should try some spelling variations:
development sovereign » development foreign, development overview, development government
industry developing » industries developing, industry development
developing coherent » developing government, developing forest, developing placement
sovereign period » sovereign risk, coverage period, sovereign food
coherent period » coherent pension, government period, deferment period

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: (( industrial development sovereign period ) OR ( industry developing coherent period ))~.
• Adding a wildcard symbol may retrieve word variants: (( industrial development sovereign period ) or ( industry developing coherent period ))*.