Perhaps you should try some spelling variations:
"mathematical methodsing" » "mathematical methods", "mathematical methodology", "mathematical method"
"mathematics modeling" » "mathematical modeling", "mathematical modelling", "mathematical models"
"mathematical model" » "mathematical models", "mathematical modeling", "mathematical methods"

Try widening your search to All Fields.

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 methodsing") OR ("mathematical model"))) OR ("mathematics modeling")).
• Removing quotes may allow a broader search: (((( mathematical methodsing ) or ( mathematical model ))) or ( mathematics modeling )).
• Adding a wildcard symbol may retrieve word variants: (((("mathematical methodsing") or ("mathematical model"))) or ("mathematics modeling"))*.