Perhaps you should try some spelling variations:
"social et moderne" » "social et modernes", "social der moderne", "social 2 moderne", "social en moderne", "social e moderne", "social etats moderne"
"social net model" » "social news model", "social na model", "social needs model"
"social et modele" » "social en modele", "social e modele", "social etats modele", "social et modeles", "social et modules", "social jet models"

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