Perhaps you should try some spelling variations:
substance network » distance network, substrate network, resistance network
science network » sciences network, science networks, science work
systems report » system report, systems support, systems transport
health science » health sciences
dence network » dense network, defence network, dense networks
health dence » health device, health evidence, 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 dence network systems report ) OR ( health science network systems recent ))) OR ( health substance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((( health dence network systems report ) or ( health science network systems recent ))) or ( health substance network synthesis report ))*.