Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
conversation efforts » conservation efforts, conservation effort, cessation efforts
grid integration » trade integration, _ integration, data integration
a conversation » _ conversation
supply grid » supply crowd, support grid
supply a » supply _

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply a conversation efforts. ) OR ( supply grid integration theories. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply a conversation efforts. ) OR ( supply grid integration theories. ))*.