Perhaps you should try some spelling variations:
"social net model" » "social news model", "social na model", "social needs model", "social net models", "social nset model", "social net modele", "social nfet model"
"social jet model" » "social je model", "social act model", "social jetlag model", "social set model", "social jset model", "social jet modele", "social jfet model"
"social et model" » "social en model", "social e model", "social etats model", "social set model", "social et modele", "social fet model"

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: "((\"social et model\") OR (((\"social net model\") OR (\"social jet model\"))))".
• Removing quotes may allow a broader search: (( social et model ) OR ((( social net model ) OR ( social jet model )))).
• Adding a wildcard symbol may retrieve word variants: (("social et model") OR ((("social net model") OR ("social jet model"))))*.