Perhaps you should try some spelling variations:
"support them international seminar." » "support them international series.", "support them international standard.", "support them international mining.", "support other international seminar.", "support igem international seminar.", "support term international seminar.", "support tool international seminar."
"supply charges irrigation system." » "supply change irrigation system.", "supply large irrigation system.", "supply surge irrigation system.", "supply charges irrigation systems.", "supply charges irrigation water.", "supply charges irrigation scheme.", "supply channels irrigation system.", "supply chains irrigation system.", "supply curves irrigation system."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply charges irrigation system.") OR ("support them international seminar."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply charges irrigation system.\") OR (\"support them international seminar.\"))".
• Removing quotes may allow a broader search: (( supply charges irrigation system. ) OR ( support them international seminar. )).
• Adding a wildcard symbol may retrieve word variants: (("supply charges irrigation system.") OR ("support them international seminar."))*.