Perhaps you should try some spelling variations:
"hedonic model" » "hedonica model", "hedonic modelo"
"hedonico model" » "hedonicao model", "hedonico modelo", "hedonica model", "edenico model", "veronico model"
"hedonismo model" » "hedonismo modelo", "peronismo model", "helenismo model", "hedonista model"
"helenico model" » "helenico modelo", "helenica model", "helenismo model", "edenico model"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("hedonic model") OR ((((("hedonico model") OR ("hedonismo model"))) OR ("helenico model"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hedonic model\") OR (((((\"hedonico model\") OR (\"hedonismo model\"))) OR (\"helenico model\"))))".
• Removing quotes may allow a broader search: (( hedonic model ) OR ((((( hedonico model ) OR ( hedonismo model ))) OR ( helenico model )))).
• Adding a wildcard symbol may retrieve word variants: (("hedonic model") OR ((((("hedonico model") OR ("hedonismo model"))) OR ("helenico model"))))*.