Perhaps you should try some spelling variations:
"gene regulatory function" » "gene regulatory functions", "gene regulation function", "gene respiratory function"
"adult ambulatory setting" » "adult regulatory setting", "adult anovulatory setting", "adult copulatory setting", "hour 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: (("adult ambulatory setting") OR ("gene regulatory function"))*.
• Removing quotes may allow a broader search: (( adult ambulatory setting ) or ( gene regulatory function ))*.