Perhaps you should try some spelling variations:
"gene regulatory relations" » "gene regulatory regions", "gene regular relations", "gene regulatory functions", "gene regulation relations"
"acute respiratory setting" » "acute respirator settings", "acute respiratory testing", "acute respiratory gating"
"acute regulatory setting" » "acute ambulatory setting", "acute regulatory reporting", "acute regulatory situation", "state regulatory setting", "acute regulation setting", "acute circulatory 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: (((("acute regulatory setting") OR ("acute respiratory setting"))) OR ("gene regulatory relations"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"acute regulatory setting\") OR (\"acute respiratory setting\"))) or (\"gene regulatory relations\"))*".
• Removing quotes may allow a broader search: (((( acute regulatory setting ) OR ( acute respiratory setting ))) or ( gene regulatory relations ))*.