Perhaps you should try some spelling variations:
"classical mechanistic" » "classical mechanisms", "classical mechanics", "classical mechanical"
"physical mechanisms" » "physiological mechanisms"
"classical mechanism" » "classical mechanisms", "classical mechanics", "classical mechanical"

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: (((("physical mechanisms") OR ("classical mechanism"))) OR ("classical mechanistic"))*.
• Removing quotes may allow a broader search: (((( physical mechanisms ) or ( classical mechanism ))) or ( classical mechanistic ))*.