Perhaps you should try some spelling variations:
"social retail model" » "social real model", "local retail model", "social rental model"
"social email model" » "social mail model", "social evil model", "social empire model", "social detail model", "social rail model", "social tail model"
"social et model" » "social en model", "social e model", "social etats model", "social net model", "social set model", "social jet model"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("social email model") OR ("social retail model"))) OR ("social et model"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"social email model\") OR (\"social retail model\"))) or (\"social et model\"))*".
• Removing quotes may allow a broader search: (((( social email model ) OR ( social retail model ))) or ( social et model ))*.