Perhaps you should try some spelling variations:
"developments psychological" » "development psychological", "developmental psychological", "developments physiological"
"developments psychology" » "development psychology", "developmental psychology", "development physiology"

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: "((\"developments psychology\") OR (\"developments psychological\"))".
• Removing quotes may allow a broader search: (( developments psychology ) OR ( developments psychological )).
• Adding a wildcard symbol may retrieve word variants: (("developments psychology") OR ("developments psychological"))*.