Perhaps you should try some spelling variations:
"social jet model" » "social je model", "social act model", "social jetlag model", "social net model", "social jnet model", "social jet modele", "social jfet model"
"social set model" » "social seat model", "social asset model", "social self model", "social net model", "social snet model", "social set modele", "social sfet model"
"social et model" » "social en model", "social e model", "social etats model", "social net model", "social et modele", "social fet model"

Try widening your search to All Fields.

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 et model") OR ("social jet model"))) OR ("social set model")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"social et model\") OR (\"social jet model\"))) or (\"social set model\"))".
• Removing quotes may allow a broader search: (((( social et model ) OR ( social jet model ))) or ( social set model )).
• Adding a wildcard symbol may retrieve word variants: (((("social et model") OR ("social jet model"))) or ("social set model"))*.