Perhaps you should try some spelling variations:
"automatic optimization" » "quadratic optimization", "automatic estimation", "stochastic optimization"
"models optimization" » "modeling optimization"
"model optimization" » "modeling optimization", "level optimization", "global optimization"

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