Perhaps you should try some spelling variations:
"genetic regulation" » "gene regulation", "genetic manipulation"
"general relative" » "general relating", "general relations", "general operative"
"general relation" » "general relations", "general regulations", "general revolution"
"general relativity" » "general relatively"

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: (("general relativity") OR ((("general relative") OR ((("general relation") OR ("genetic regulation")))))).
• Removing quotes may allow a broader search: (( general relativity ) or ((( general relative ) or ((( general relation ) or ( genetic regulation )))))).
• Adding a wildcard symbol may retrieve word variants: (("general relativity") or ((("general relative") or ((("general relation") or ("genetic regulation"))))))*.