Perhaps you should try some spelling variations:
"support trade integration theories." » "support trade integration theory.", "support trade integration through.", "support trade integration efforts.", "export trade integration theories.", "support grant integration theories.", "import trade integration theories."
"support fare integration some." » "support market integration some.", "support data integration some.", "support _ reintegration some.", "support fare integration volume.", "support fare integration power.", "support fare integration south.", "support falls integration some.", "support state integration some.", "support water integration some."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("support trade integration theories.") OR ("support fare integration some."))~.
• Removing quotes may allow a broader search: (( support trade integration theories. ) or ( support fare integration some. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support trade integration theories.") or ("support fare integration some."))*.