Perhaps you should try some spelling variations:
"social jet modele" » "social je modele", "social act modele", "social jetlag modele", "social jet model", "social jet models", "social et modele", "social jnet modele", "social jset modele", "social jjet modele"
"social lag model" » "social law model", "social la model", "social lab model", "social lag models", "social bag model", "social bag models"
"social et model" » "social en model", "social etats model", "social net model", "social set model", "social jet model", "social ent model"
"social e model" » "social en model", "social e modelli"

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