Perhaps you should try some spelling variations:
"export trade integration schengen." » "export trade integration changed.", "export trade integration schemes.", "export trade integration challenges.", "export taxes integration schengen.", "export base integration schengen.", "export tax integration schengen."
"supply syria irrigation systems." » "supply africa irrigation systems.", "supply drip irrigation systems.", "supply surge irrigation systems.", "supply social irrigation systems.", "supply sierra irrigation systems.", "supply syria irrigation system."

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 schengen.") or ("supply syria irrigation systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("export trade integration schengen.") OR ("supply syria irrigation systems.")).
• Removing quotes may allow a broader search: (( export trade integration schengen. ) or ( supply syria irrigation systems. )).
• Adding a wildcard symbol may retrieve word variants: (("export trade integration schengen.") or ("supply syria irrigation systems."))*.