Perhaps you should try some spelling variations:
"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.

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