Perhaps you should try some spelling variations:
"support build international seminar." » "support build international series.", "support build international standard.", "support build international mining.", "support builds international seminar.", "support building international seminar.", "support third international seminar.", "support big international seminar."
"supply canal irrigation systems." » "supply scale irrigation systems.", "supply canada irrigation systems.", "supply annual irrigation systems.", "supply china irrigation systems.", "supply canal 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 canal irrigation systems.") or ("support build international seminar."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply canal irrigation systems.") OR ("support build international seminar.")).
• Removing quotes may allow a broader search: (( supply canal irrigation systems. ) or ( support build international seminar. )).
• Adding a wildcard symbol may retrieve word variants: (("supply canal irrigation systems.") or ("support build international seminar."))*.