Perhaps you should try some spelling variations:
"supply cost integration theories." » "supply cost integration theory.", "supply cost integration through.", "supply cost integration efforts.", "supply south integration theories.", "supply tool integration theories.", "supply can integration theories.", "supply costs integration theories."
"supply grid irrigation schemes." » "supply grid irrigation scheme.", "supply grid irrigation systems.", "supply drip irrigation schemes.", "supply syria irrigation schemes.", "supply crop irrigation schemes.", "supply crowd irrigation schemes.", "support grid irrigation schemes."

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: (("supply cost integration theories.") OR ("supply grid irrigation schemes."))~.
• Removing quotes may allow a broader search: (( supply cost integration theories. ) or ( supply grid irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply cost integration theories.") or ("supply grid irrigation schemes."))*.