Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theory.", "supply trade integration through.", "supply trade integration efforts.", "supply side integration theories.", "supply case integration theories."
"supply asian irrigation schemes." » "supply asian irrigation scheme.", "supply asian irrigation systems.", "supply basin irrigation schemes.", "supply asian integration schemes.", "supply africa irrigation schemes.", "supply side irrigation schemes.", "supply asset irrigation schemes.", "supply urban 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: (("supply asian irrigation schemes.") or ("supply trade integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply asian irrigation schemes.") OR ("supply trade integration theories."))*.
• Removing quotes may allow a broader search: (( supply asian irrigation schemes. ) or ( supply trade integration theories. ))*.