Perhaps you should try some spelling variations:
"formal epistemology" » "social epistemology", "personal epistemology"
"legal epistemology" » "logic epistemology", "social epistemology", "personal epistemology"
"moral epistemology" » "social epistemology", "logic epistemology", "personal epistemology"

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: (((("formal epistemology") OR ("legal epistemology"))) OR ("moral epistemology")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"formal epistemology\") OR (\"legal epistemology\"))) or (\"moral epistemology\"))".
• Removing quotes may allow a broader search: (((( formal epistemology ) OR ( legal epistemology ))) or ( moral epistemology )).
• Adding a wildcard symbol may retrieve word variants: (((("formal epistemology") OR ("legal epistemology"))) or ("moral epistemology"))*.