Perhaps you should try some spelling variations:
"supply factors integration series." » "supply factor integration series.", "supply facto integration series.", "supply sector integration series.", "supply factors integration services.", "supply factors interaction series.", "supply factors integration server.", "supply functions integration series."
"import data irrigation systems." » "import delta irrigation systems.", "import canal irrigation systems.", "import water irrigation systems.", "import duty irrigation systems.", "import data irrigation system."

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: (("import data irrigation systems.") OR ("supply factors integration series."))~.
• Removing quotes may allow a broader search: (( import data irrigation systems. ) or ( supply factors integration series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("import data irrigation systems.") or ("supply factors integration series."))*.