Perhaps you should try some spelling variations:
"gene regulatory relations" » "gene regulatory regions", "gene regular relations", "gene regulatory functions", "gene regulation relations"
"state regulatory setting" » "state regulatory reporting", "state regulatory situation", "state regulation setting", "cycle regulatory setting"
"state ambulatory setting" » "stroke ambulatory setting", "care ambulatory setting", "systems ambulatory setting"

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: (("gene regulatory relations") OR ((("state regulatory setting") OR ("state ambulatory setting")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"gene regulatory relations\") or (((\"state regulatory setting\") OR (\"state ambulatory setting\"))))".
• Removing quotes may allow a broader search: (( gene regulatory relations ) or ((( state regulatory setting ) OR ( state ambulatory setting )))).
• Adding a wildcard symbol may retrieve word variants: (("gene regulatory relations") or ((("state regulatory setting") OR ("state ambulatory setting"))))*.