Perhaps you should try some spelling variations:
social effect » social effects, societal effect, special effect
social exact » social et, social email, social era
social etats » social ethics
etats model » etas model, rats model, beats 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 exact) OR (social effect)) model ) OR ( social etats model )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((social exact) OR (social effect)) model ) or ( social etats model ))".
• Adding a wildcard symbol may retrieve word variants: (( ((social exact) OR (social effect)) model ) or ( social etats model ))*.