Perhaps you should try some spelling variations:
"plasma technologies" » "laser technologies", "plasma technology", "data technologies"
"plant technologies" » "pnt technologies", "agent technologies", "art technologies"
"plant technology" » "implant technology", "plant biotechnology", "plasma technology"

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: (("plant technology") OR ((((("plant technologies") OR ("plasma technologies"))) OR ("smart technologies"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"plant technology\") or (((((\"plant technologies\") OR (\"plasma technologies\"))) or (\"smart technologies\"))))*".
• Removing quotes may allow a broader search: (( plant technology ) or ((((( plant technologies ) OR ( plasma technologies ))) or ( smart technologies ))))*.