Perhaps you should try some spelling variations:
"support 2 immigration policies." » "support 2 immigration policy.", "support 2 migration policy.", "support _ immigration policies.", "support net immigration policies.", "support u.s immigration policies.", "support a immigration policies.", "support 2002 immigration policies."
"support data irrigation schemes." » "support data irrigation scheme.", "support data irrigation systems.", "support canal irrigation schemes.", "support water irrigation schemes.", "support spate irrigation schemes.", "import data irrigation schemes.", "support a irrigation schemes.", "export data irrigation schemes."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("support 2 immigration policies.") or ("support data irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support 2 immigration policies.") OR ("support data irrigation schemes.")).
• Removing quotes may allow a broader search: (( support 2 immigration policies. ) or ( support data irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("support 2 immigration policies.") or ("support data irrigation schemes."))*.