Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » science network, dence network, incidence networks
guidance network » finance network, impedance network, guided network
health guidance » health evidence, health finance
system report » system reform, system support
system recent » systems recent
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) OR (guidance network)) ((system report) OR (system recent)) ) OR ((( ((health guidance) OR (health substance)) 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) OR (guidance network)) ((system report) or (system recent)) ) or ((( ((health guidance) or (health substance)) network synthesis report ) or ( health guide network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health ((evidence network) OR (guidance network)) ((system report) or (system recent)) ) or ((( ((health guidance) or (health substance)) network synthesis report ) or ( health guide network synthesis report ))))*.