Perhaps you should try some spelling variations:
productive » productivo, productiva, productivos
productivas » productiva, productivos, productivo
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((productive OR productivas) 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 productivas) or (productor or reproductor)) or (transductor or (transduction or transaction)))~".
• Adding a wildcard symbol may retrieve word variants: (((productive OR productivas) or (productor or reproductor)) or (transductor or (transduction or transaction)))*.