Perhaps you should try some spelling variations:
classical theories » classical theory, physical theories
classical series » classical steroids, classical studies, classical sources
classical source » classical sources, classic source, classical force
source library » resource library, source libraries
classical core » classical codes, classical case, classical charge
core library » code library, case library, core libraries

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((((\\"((classical series) OR (classical theories)) library\\") or (\\"classical source library\\"))) or (\\"classical core library\\"))\"".
• Removing quotes may allow a broader search: (((( ((classical series) OR (classical theories)) library ) or ( classical source library ))) or ( classical core library )).