Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theory.", "supply trade integration through.", "supply trade integration efforts.", "supply side integration theories.", "supply case integration theories."
"support grid integration schemes." » "support grid irrigation schemes.", "support grid integration some.", "support _ integration schemes.", "support data integration schemes.", "support agri integration schemes.", "support grant integration schemes.", "support group integration schemes."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support grid integration schemes.") OR ("supply trade integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support grid integration schemes.\") OR (\"supply trade integration theories.\"))*".
• Removing quotes may allow a broader search: (( support grid integration schemes. ) OR ( supply trade integration theories. ))*.