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

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: "((\"cycle regulatory relations\") OR (\"acute regulatory setting\"))*".
• Removing quotes may allow a broader search: (( cycle regulatory relations ) OR ( acute regulatory setting ))*.