Perhaps you should try some spelling variations:
"support agri integration theories." » "support agri integration theory.", "support agri integration through.", "support agri integration efforts.", "support grid integration theories.", "support care integration theories.", "support gvc integration theories.", "support a integration theories."
"support fare integration series." » "support fare integrating services.", "support fare integration schemes.", "support fare integration social.", "support market integration series.", "support trade integration series.", "support data integration series.", "support falls integration series.", "support state integration series."

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: "((\"support fare integration series.\") OR (\"support agri integration theories.\"))~".
• Removing quotes may allow a broader search: (( support fare integration series. ) OR ( support agri integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support fare integration series.") OR ("support agri integration theories."))*.