Perhaps you should try some spelling variations:
"mathematical optimisation" » "mathematical optimization", "mathematical applications", "mathematical formulation"
"mathematics optimization" » "mathematical optimization", "automatic optimization", "materials optimization"
"mathematical simulation" » "mathematical formulation", "mathematical optimization", "mathematical foundation"

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