Perhaps you should try some spelling variations:
optimisation » optimization, optimizacion, optimezation
utilization » utilizacion, utilizaron, civilization
reutilizacion » utilizacion, fertilizacion
atomisation » atomization, atomizacion
factorization » autorizacion, sectorizacion
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 reutilizacion)) or (atomisation or factorization)) of same~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((optimisation OR (utilization OR reutilizacion)) OR (atomisation OR factorization)) of same.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((optimisation or (utilization OR reutilizacion)) or (atomisation or factorization)) of same".
• Adding a wildcard symbol may retrieve word variants: ((optimisation or (utilization OR reutilizacion)) or (atomisation or factorization)) of same*.