Perhaps you should try some spelling variations:
"support 3rd international seminar." » "support 3rd international series.", "support 3rd international standard.", "support 3rd international mining.", "support 2nd international seminar.", "support 3.4 international seminar.", "support 3 international seminar.", "support 3.2 international seminar."
"import data irrigation systems." » "import delta irrigation systems.", "import canal irrigation systems.", "import water irrigation systems.", "import duty irrigation systems.", "import data 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: (("support 3rd international seminar.") or ("import data irrigation systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support 3rd international seminar.") OR ("import data irrigation systems."))*.
• Removing quotes may allow a broader search: (( support 3rd international seminar. ) or ( import data irrigation systems. ))*.