Perhaps you should try some spelling variations:
integration theory » integration through, information theory, innovation theory
planning services » banking services
load planning » road planning, roads planning, board planning
supply grid » supply crowd, supply great, support grid
export load » export loans, export led, export good

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: (( supply grid integration theory. ) OR ( export load planning services. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply grid integration theory. ) or ( export load planning services. ))*.