Perhaps you should try some spelling variations:
"support european integration theories." » "support european integration theory.", "support european integration through.", "support european integration efforts.", "support europe integration theories."
"support fare integration some." » "support market integration some.", "support trade integration some.", "support data integration some.", "support fare integration volume.", "support fare integration power.", "support fare integration south.", "support falls integration some.", "support state 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 european integration theories.") OR ("support fare integration some."))~.
• Removing quotes may allow a broader search: (( support european integration theories. ) or ( support fare integration some. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support european integration theories.") or ("support fare integration some."))*.