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

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) OR (science network)) ((systems report) OR (systems support))\") or (\"health dence network ((systems report) OR (systems support))\"))) or (\"health substance network synthesis report\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((((\\"health ((evidence network) or (science network)) ((systems report) OR (systems support))\\") or (\\"health dence network ((systems report) OR (systems support))\\"))) or (\\"health substance network synthesis report\\"))\"".
• Removing quotes may allow a broader search: (((( health ((evidence network) or (science network)) ((systems report) OR (systems support)) ) or ( health dence network ((systems report) OR (systems support)) ))) or ( health substance network synthesis report )).