Perhaps you should try some spelling variations:
"support crop irrigation schemes." » "support crop irrigation scheme.", "support crop irrigation systems.", "support drip irrigation schemes.", "support scale irrigation schemes.", "support canal irrigation schemes.", "support crops irrigation schemes.", "support group irrigation schemes.", "support cross irrigation schemes."
"import data integration series." » "import data integration theories.", "import data integrating services.", "import data integration schemes.", "import trade integration series.", "import _ integration series.", "import data integrity series.", "import duty 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: (("import data integration series.") or ("support crop irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("import data integration series.") OR ("support crop irrigation schemes.")).
• Removing quotes may allow a broader search: (( import data integration series. ) or ( support crop irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("import data integration series.") or ("support crop irrigation schemes."))*.