Perhaps you should try some spelling variations:
making development » mining development, during development, planning development
strategy learning » strategy learnings, strategic learning, strategy planning
development state » development stage, developmental state, redevelopment state
coal resource » coal resources, local resource, total resource
state status » state states, states states, staff status
deal » real

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: (( coal resource development strategy learning ) OR ( deal making development state status ))~.
• Adding a wildcard symbol may retrieve word variants: (( coal resource development strategy learning ) or ( deal making development state status ))*.