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 farm irrigation system." » "supply farm irrigation systems.", "supply farm irrigation water.", "supply farm irrigation scheme.", "supply scale irrigation system.", "supply canal irrigation system."

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 farm irrigation system.\") OR (\"supply rate international seminar.\"))~".
• Removing quotes may allow a broader search: (( supply farm irrigation system. ) OR ( supply rate international seminar. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply farm irrigation system.") OR ("supply rate international seminar."))*.