Perhaps you should try some spelling variations:
material foundations » material functions, categorical foundations, numerical foundations
material foundation » material formation, material function, moral foundation
john simmons » john simson, john symons, john commons

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: "john simmons guggenheim ((material foundation) OR (material foundations))".
• Adding a wildcard symbol may retrieve word variants: john simmons guggenheim ((material foundation) OR (material foundations))*.