Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
network synthesis » network systems
science networks » science network, sciences network, sequence networks
guidance network » finance network, guided network, science network
health impedance » health importance, health temperance, head impedance
health science » health sciences
network system » network systems, networked systems
dence network » dense network, defence network, dense networks
guide network » guided network, side network, wide network
system report » system reform, system support, system recent
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 science networks synthesis report ) OR ( health dence network synthesis report ))) OR ((( health ((guidance network) OR (guide network)) synthesis report ) OR ( health impedance network system report )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health science networks synthesis report ) or ( health dence network synthesis report ))) or ((( health ((guidance network) OR (guide network)) synthesis report ) or ( health impedance network system report ))))".
• Adding a wildcard symbol may retrieve word variants: (((( health science networks synthesis report ) or ( health dence network synthesis report ))) or ((( health ((guidance network) OR (guide network)) synthesis report ) or ( health impedance network system report ))))*.