Perhaps you should try some spelling variations:
"supply grid integration theories." » "supply grid integration theory.", "supply grid integration through.", "supply grid integration efforts.", "supply trade integration theories.", "supply _ integration theories.", "supply data integration theories.", "supply crowd integration theories.", "support grid integration theories."
"supply water navigation services." » "supply water sanitation services.", "supply water sanitation service.", "supply water information services.", "supply air navigation services.", "supply water irrigation services."

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 grid integration theories.\") OR (\"supply water navigation services.\"))~".
• Removing quotes may allow a broader search: (( supply grid integration theories. ) OR ( supply water navigation services. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration theories.") OR ("supply water navigation services."))*.