Perhaps you should try some spelling variations:
"mathematical optimisation" » "mathematics optimization", "mathematical applications", "mathematical formulation"
"mathematical simulation" » "mathematical formulation", "mathematical induction"
"mathematical foundation" » "mathematical foundations", "mathematical formulation", "mathematical functions"

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