Perhaps you should try some spelling variations:
"support plants international aid." » "support paths international aid.", "support planning international aid.", "support japan's international aid.", "support plants international airshow.", "support plants international airport.", "support plans international aid.", "support grant international aid.", "support land international aid."
"supply china irrigation systems." » "supply change irrigation systems.", "supply canal irrigation systems.", "supply high irrigation systems.", "supply chains irrigation systems.", "supply chain irrigation systems.", "supply china 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 china irrigation systems.") or ("support plants international aid."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply china irrigation systems.") OR ("support plants international aid.")).
• Removing quotes may allow a broader search: (( supply china irrigation systems. ) or ( support plants international aid. )).
• Adding a wildcard symbol may retrieve word variants: (("supply china irrigation systems.") or ("support plants international aid."))*.