Perhaps you should try some spelling variations:
optimisation » optimizacion, optimezation, utilisation
utilization » utilizacion, utilizaron, reutilizacion
optimization » optimizacion
factorization » autorizacion, sectorizacion
automatization » automatizacion, laautomatizacion, automatizado
same » some

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((optimisation or utilization) or optimization) or (factorization or automatization)) of same~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((optimisation OR utilization) OR optimization) OR (factorization OR automatization)) of same.
• Adding a wildcard symbol may retrieve word variants: (((optimisation or utilization) or optimization) or (factorization or automatization)) of same*.