Perhaps you should try some spelling variations:
"hedonico model" » "hedonica model", "hedonismo model", "edenico model", "hedonico modelo"
"hedonista model" » "hedonista modelo", "peronista model", "hedonica model", "hedonismo model"
"helenico model" » "helenico modelo", "helenica model", "edenico model", "elenio model"
"helenismo model" » "helenismo modelo"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hedonico model\") OR (((\"hedonista model\") OR (((\"helenico model\") OR (\"helenismo model\"))))))~".
• Removing quotes may allow a broader search: (( hedonico model ) OR ((( hedonista model ) OR ((( helenico model ) OR ( helenismo model ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("hedonico model") OR ((("hedonista model") OR ((("helenico model") OR ("helenismo model"))))))*.