Perhaps you should try some spelling variations:
"special respect model" » "special aspects model", "special report model", "special effect model", "special aspect model", "special respective model", "special respect de"
"special effects model" » "special effects models", "special effect models"
"social exact model" » "social effect model", "social etats model", "social et 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 model") OR ((("special effects model") OR ("special respect model"))))*.
• Removing quotes may allow a broader search: (( social exact model ) or ((( special effects model ) or ( special respect model ))))*.