Perhaps you should try some spelling variations:
"development psychological" » "unemployment psychological", "environment psychological", "development biological"
"development technological" » "development technologies", "development technical", "treatment technological"
"development psychology" » "developmental psychology", "development physiology", "development ecology"
"development technology" » "developmental psychology"

Try widening your search to All Fields.

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: (((("development psychology") OR ("development technology"))) OR ((("development psychological") OR ("development technological")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"development psychology\") OR (\"development technology\"))) or (((\"development psychological\") or (\"development technological\"))))".
• Removing quotes may allow a broader search: (((( development psychology ) OR ( development technology ))) or ((( development psychological ) or ( development technological )))).
• Adding a wildcard symbol may retrieve word variants: (((("development psychology") OR ("development technology"))) or ((("development psychological") or ("development technological"))))*.