Perhaps you should try some spelling variations:
"export trade integration schemes." » "export trade irrigation schemes.", "export trade integration some.", "export trade integration theories.", "export share integration schemes.", "export taxes integration schemes.", "export price integration schemes."
"supply factors integration series." » "supply factor integration series.", "supply facto integration series.", "supply sector integration series.", "supply factors integration theories.", "supply factors integrating services.", "supply factors integration social.", "supply functions integration series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("export trade integration schemes.") or ("supply factors integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("export trade integration schemes.") OR ("supply factors integration series."))*.
• Removing quotes may allow a broader search: (( export trade integration schemes. ) or ( supply factors integration series. ))*.