Perhaps you should try some spelling variations:
network synthesis » network systems
guidance network » guide network, finance network, impedance network
evidence network » science network, incidence networks, resilience network
health guidance » health evidence, health finance, health substance
systems report » system report, systems support, systems recent
dence network » dense network, defence network, dense networks
health guided » health guide, hath guided, health guido

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