Perhaps you should try some spelling variations:
network synthesis » network systems
guidance network » finance network, impedance network, guided network
evidence network » science network, dence network, incidence networks
health evidence » health science
systems support » systems supporting, system supporting
health guidance » health finance, health substance
systems report » system report, systems recent, systems transport
guide network » guided network, side network, wide network
health guide » health guido, earth guide, health grid

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