Perhaps you should try some spelling variations:
"hour regulatory relations" » "hour regulatory regions", "hour regular relations", "hour regulatory functions", "should regulatory relations", "hour regulations relations", "bound regulatory relations"
"veins ambulatory setting" » "veins regulatory setting", "versus ambulatory setting", "using ambulatory setting", "axis ambulatory setting"
"power regulator setting" » "power regulatory setting", "power regulatory settings", "power emulator setting", "power regulation setting", "power modulator setting", "power simulator 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: (("veins ambulatory setting") OR ((("hour regulatory relations") OR ("power regulator setting")))).
• Removing quotes may allow a broader search: (( veins ambulatory setting ) or ((( hour regulatory relations ) or ( power regulator setting )))).
• Adding a wildcard symbol may retrieve word variants: (("veins ambulatory setting") or ((("hour regulatory relations") or ("power regulator setting"))))*.