Perhaps you should try some spelling variations:
"supply can integration theories." » "supply can integration theory.", "supply can integration through.", "supply can integration efforts.", "supply chain integration theories.", "supply care integration theories.", "supply urban integration theories.", "supply case integration theories.", "supply a integration theories."
"supply flood irrigation system." » "supply flood irrigation systems.", "supply flood irrigation water.", "supply flood irrigation scheme.", "supply flood mitigation system.", "supply led irrigation system.", "supply farm irrigation system.", "supply crowd irrigation system.", "supply low irrigation system."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply flood irrigation system.") or ("supply can integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply flood irrigation system.") OR ("supply can integration theories.")).
• Removing quotes may allow a broader search: (( supply flood irrigation system. ) or ( supply can integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("supply flood irrigation system.") or ("supply can integration theories."))*.