Perhaps you should try some spelling variations:
substance network » distance network, substrate network, resistance network
evidence network » science network, guidance network, incidence networks
health evidence » health science
systems report » systems support, systems recent, systems transport
network system » networked systems
system report » system reform, system support, system recent
dence network » dense network, defence network, dense networks
health dence » health device, health science, health devices

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 network systems report ) OR ( health evidence network system report ))) OR ( health dence network systems report ))) OR ( health substance network synthesis report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((( health evidence network systems report ) OR ( health evidence network system report ))) or ( health dence network systems report ))) or ( health substance network synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (((((( health evidence network systems report ) OR ( health evidence network system report ))) or ( health dence network systems report ))) or ( health substance network synthesis report ))*.