Perhaps you should try some spelling variations:
"export trade integration theories." » "export trade integration theorems.", "export trade integrationstheorie 2.", "export trade integration theory.", "export taxes integration theories.", "export base integration theories.", "export tax integration theories."
"supply facto integration series." » "supply facto integration services.", "supply facto interaction series.", "supply facto integration server.", "supply factor integration series.", "supply faculty integration series.", "supply sector integration series.", "supply factors integration series.", "supply data 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 theories.") or ("supply facto integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("export trade integration theories.") OR ("supply facto integration series."))*.
• Removing quotes may allow a broader search: (( export trade integration theories. ) or ( supply facto integration series. ))*.