Perhaps you should try some spelling variations:
"supply rate international seminar." » "supply rate international standard.", "supply rate international journal.", "supply rate international air.", "supply rates international seminar.", "supply trade international seminar.", "supply raise international seminar.", "supply water international seminar.", "supply case international seminar.", "supply data international seminar."
"supply canal irrigation system." » "supply canal irrigation systems.", "supply canal irrigation water.", "supply canal irrigation scheme.", "supply scale irrigation system.", "supply annual irrigation system.", "supply rural irrigation system.", "supply case irrigation system."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply canal irrigation system.") OR ("supply rate international seminar."))~.
• Removing quotes may allow a broader search: (( supply canal irrigation system. ) or ( supply rate international seminar. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply canal irrigation system.") or ("supply rate international seminar."))*.