Perhaps you should try some spelling variations:
"mathematical methodss in physics" » "mathematical methods in physics", "mathematical method in physics", "mathematics methods in physics"
"mathematical model in physics" » "mathematical models in physics", "mathematical modeling in physics", "mathematical methods in physics"

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 methodss in physics") OR ("mathematical model in physics"))*.
• Removing quotes may allow a broader search: (( mathematical methodss in physics ) or ( mathematical model in physics ))*.