Perhaps you should try some spelling variations:
"supply nepal irrigation schemes." » "supply nepal irrigation scheme.", "supply nepal irrigation systems.", "supply canal irrigation schemes.", "supply level irrigation schemes.", "supply local irrigation schemes.", "supply annual irrigation schemes.", "supply needs irrigation schemes."
"supply grid conservation efforts." » "supply aid conservation efforts.", "supply good conservation efforts.", "supply grass conservation efforts.", "supply crowd conservation efforts.", "supply great conservation efforts.", "support grid conservation efforts."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply grid conservation efforts.\") OR (\"supply nepal irrigation schemes.\"))~".
• Removing quotes may allow a broader search: (( supply grid conservation efforts. ) OR ( supply nepal irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply grid conservation efforts.") OR ("supply nepal irrigation schemes."))*.