Perhaps you should try some spelling variations:
"export modal integration theories." » "export modal integration theory.", "export modal integration through.", "export modal integration efforts.", "export global integration theories.", "export social integration theories.", "export tool integration theories.", "export day integration theories.", "export more integration theories."
"support grid integration schemes." » "support grid irrigation schemes.", "support grid integration some.", "support trade integration schemes.", "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 ("export modal integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grid integration schemes.") OR ("export modal integration theories.")).
• Removing quotes may allow a broader search: (( support grid integration schemes. ) or ( export modal integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support grid integration schemes.") or ("export modal integration theories."))*.