Perhaps you should try some spelling variations:
"social nset model" » "social net model", "social insect model", "social asset model", "social set model", "social nsnet model", "social nsset model", "social nsjet model"
"social et model" » "social en model", "social e model", "social etats model", "social net model", "social set model", "social jet 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 et model") OR ("social nset model"))*.
• Removing quotes may allow a broader search: (( social et model ) or ( social nset model ))*.