Perhaps you should try some spelling variations:
"support can irrigation schemes." » "support can irrigation scheme.", "support can irrigation systems.", "support canal irrigation schemes.", "support tank irrigation schemes.", "support change irrigation schemes.", "support chuan irrigation schemes.", "support a irrigation schemes.", "support carbon irrigation schemes."
"support bank information theory." » "support urban information theory.", "support 1 information theory.", "support basic information theory.", "support a information theory.", "import bank information theory."

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: (("support can irrigation schemes.") OR ("support bank information theory."))~.
• Removing quotes may allow a broader search: (( support can irrigation schemes. ) or ( support bank information theory. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support can irrigation schemes.") or ("support bank information theory."))*.