Perhaps you should try some spelling variations:
health science » health sciences
substance net » substance heat, substance act, substance des
evidence net » evidence next, evidence new, evidence nber
work system » work systems, network system

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: (((( health evidence net((work system) OR (world system)) supporting ) OR ( health science ((work system) OR (world system)) supporting ))) OR ( health substance net((work system) OR (world system)) supporting )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health evidence net((work system) OR (world system)) supporting ) or ( health science ((work system) OR (world system)) supporting ))) or ( health substance net((work system) OR (world system)) supporting ))".
• Adding a wildcard symbol may retrieve word variants: (((( health evidence net((work system) OR (world system)) supporting ) or ( health science ((work system) OR (world system)) supporting ))) or ( health substance net((work system) OR (world system)) supporting ))*.