Perhaps you should try some spelling variations:
"hearts control" » "heart control", "heat control", "yeasts control"
"health control" » "healthy controls", "health context", "health centres"
"agents control" » "agent control", "plants control"
"charts control" » "chaos control", "charge control", "chart controls"
"ants control" » "plants control", "facts control", "its control"

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: (((((("hearts control") OR ("health control"))) OR ((("ants control") OR ("agents control"))))) OR ("charts control")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"hearts control\") or (\"health control\"))) or (((\"ants control\") OR (\"agents control\"))))) or (\"charts control\"))".
• Removing quotes may allow a broader search: (((((( hearts control ) or ( health control ))) or ((( ants control ) OR ( agents control ))))) or ( charts control )).
• Adding a wildcard symbol may retrieve word variants: (((((("hearts control") or ("health control"))) or ((("ants control") OR ("agents control"))))) or ("charts control"))*.