Perhaps you should try some spelling variations:
"supply chn irrigation schemes." » "supply chn irrigation scheme.", "supply chn irrigation systems.", "supply change irrigation schemes.", "supply canal irrigation schemes.", "supply crop irrigation schemes.", "supply ch irrigation schemes.", "supply chain irrigation schemes.", "supply china irrigation schemes."
"supply chai lending services." » "supply chai nonlending services.", "supply chai planning services.", "supply chai banking services.", "supply chain linking services.", "supply coal blending services.", "supply chain feeding services.", "supply chain lending services.", "supply chains lending services.", "supply ch lending services."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("supply chai lending services.") or ("supply chn irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chai lending services.") OR ("supply chn irrigation schemes.")).
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• Adding a wildcard symbol may retrieve word variants: (("supply chai lending services.") or ("supply chn irrigation schemes."))*.