Perhaps you should try some spelling variations:
"support grid irrigation schemes." » "support grid irrigation scheme.", "support grid irrigation systems.", "support grain irrigation schemes.", "support drip irrigation schemes.", "support gray irrigation schemes.", "support agri irrigation schemes.", "support grant irrigation schemes.", "support group irrigation schemes."
"support trade integration series." » "support trade integration services.", "support trade interaction series.", "support trade integration server.", "support trainer integration series.", "export trade integration series.", "import trade 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: (("support grid irrigation schemes.") OR ("support trade integration series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support grid irrigation schemes.\") OR (\"support trade integration series.\"))".
• Removing quotes may allow a broader search: (( support grid irrigation schemes. ) OR ( support trade integration series. )).
• Adding a wildcard symbol may retrieve word variants: (("support grid irrigation schemes.") OR ("support trade integration series."))*.