Perhaps you should try some spelling variations:
"environmental philosophy" » "continental philosophy"
"environmental physiology" » "environmental psychology", "environmental physics", "environmental geology"
"environmental sociology" » "environmental psychology", "environmental social", "environmental geology"

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: (((((("environmental philosophy") OR ("environmental physiology"))) OR ("experimental philosophy"))) OR ("environmental sociology")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"environmental philosophy\") OR (\"environmental physiology\"))) or (\"experimental philosophy\"))) or (\"environmental sociology\"))".
• Removing quotes may allow a broader search: (((((( environmental philosophy ) OR ( environmental physiology ))) or ( experimental philosophy ))) or ( environmental sociology )).
• Adding a wildcard symbol may retrieve word variants: (((((("environmental philosophy") OR ("environmental physiology"))) or ("experimental philosophy"))) or ("environmental sociology"))*.