Perhaps you should try some spelling variations:
"statistical mechanical" » "statistical mechanics"
"classical mechanical" » "chemical mechanical", "physical mechanical", "classical mathematical"
"classical mechanics" » "classical mechanisms"

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: (((("classical mechanics") OR ("statistical mechanical"))) OR ("classical mechanical")).
• Removing quotes may allow a broader search: (((( classical mechanics ) or ( statistical mechanical ))) or ( classical mechanical )).
• Adding a wildcard symbol may retrieve word variants: (((("classical mechanics") or ("statistical mechanical"))) or ("classical mechanical"))*.