Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » dence network, incidence networks, resilience network
science networks » sciences network, sequence networks, science works
guidance network » guide network, finance network, impedance network
science network » sciences network, science work, sequence networks
systems support » system support, systems supporting, system supporting
health guidance » health evidence, health finance, health substance
health guide » earth guide, health side, health guiding
health guido » health gindo, health guiding, health gains
health grid » health gis, health good, health hybrid

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 (science networks)))) systems support ) OR ((( health guidance network synthesis report ) OR ( ((((health guide) OR (health guido))) 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 (science networks)))) systems support ) or ((( health guidance network synthesis report ) or ( ((((health guide) OR (health guido))) or (health grid)) network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health ((evidence network) or (((science network) or (science networks)))) systems support ) or ((( health guidance network synthesis report ) or ( ((((health guide) OR (health guido))) or (health grid)) network synthesis report ))))*.