Perhaps you should try some spelling variations:
productive » productivo, productiva, productivas
productor » productos, producto, productores
reproductor » reproductos, reproducto, reproductores, reproduccion
transductor » traductor
transduction » translocation, transition, transactions
transaction » transactions, transition, translation

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((productive or (productor OR reproductor)) or (transductor or (transduction or transaction)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((productive OR (productor OR reproductor)) OR (transductor OR (transduction OR transaction)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((productive or (productor OR reproductor)) or (transductor or (transduction or transaction)))*".