Perhaps you should try some spelling variations:
"parton model" » "carton model", "barton model", "darton model", "parten model", "partn model", "pardon model"
"parton modelo" » "carton modelo", "barton modelo", "darton modelo", "parton modelos", "parten modelo", "partn modelo", "pardon modelo"
"parten modelo" » "parten modelos", "parte modelo", "partes modelo"
"parto model" » "parte model", "part model", "pardo model"

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

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