Perhaps you should try some spelling variations:
effective treatment » effective management
your effective » four effective, young effective, dufour effective
workers chung » workers coping, workers aging, workers among
workers your » workers youth, works your, workers younger
new workers » new yorker, new markers, line workers

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: (( 7th new ((workers chung) OR (hikers chung)) effective treatment ) OR ( 7th new workers your effective treatment )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( 7th new ((workers chung) OR (hikers chung)) effective treatment ) or ( 7th new workers your effective treatment ))".
• Adding a wildcard symbol may retrieve word variants: (( 7th new ((workers chung) OR (hikers chung)) effective treatment ) or ( 7th new workers your effective treatment ))*.