Perhaps you should try some spelling variations:
"key regulatory properties" » "key regularity properties", "key regular properties", "key regulatory perspectives", "key regulator properties", "key regulators properties", "4 regulatory properties"
"3 regulatory properties" » "3 regularity properties", "3 regular properties", "3 regulatory perspectives", "law regulatory properties"
"a regulatory properties" » "a regularity properties", "a regular properties", "a regulatory perspectives"
"3 regulatory peptides" » "3 regulatory regimes", "law regulatory peptides"
"3 regulation peptides" » "3 regulating peptides", "3 regulation peptidergic", "3 regulation practices"

Try widening your search to All Fields.

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: (("key regulatory properties") OR ((((("3 regulatory properties") OR ((("3 regulatory peptides") OR ("3 regulation peptides"))))) OR ("a regulatory properties")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"key regulatory properties\") or (((((\"3 regulatory properties\") or (((\"3 regulatory peptides\") OR (\"3 regulation peptides\"))))) or (\"a regulatory properties\"))))".
• Removing quotes may allow a broader search: (( key regulatory properties ) or ((((( 3 regulatory properties ) or ((( 3 regulatory peptides ) OR ( 3 regulation peptides ))))) or ( a regulatory properties )))).
• Adding a wildcard symbol may retrieve word variants: (("key regulatory properties") or ((((("3 regulatory properties") or ((("3 regulatory peptides") OR ("3 regulation peptides"))))) or ("a regulatory properties"))))*.