Perhaps you should try some spelling variations:
network synthesis » network systems
guidance network » guide network, finance network, impedance network
evidence network » dence network, incidence networks, resilience network
science network » science networks, science work, sequence networks
health guidance » health evidence, health finance, health substance
systems report » system report, systems support, systems recent
health guide » health guido, earth guide, health side
health grid » health guido, health gis, health good

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